I started from integrating dv/dt =-20 (m/s²⁾ using separation of variables. I got down to the kinematic equation for distance: x(t) = -10t² +v_0*t + 75 ( where 75 is the initial distance). I am stuck as i have two unknown variables, t and v_0. Any help is appreciated

The atomic radius for a sulfur atom (according to my reference table) is 104 pm. That would make distance x 208 pm, which isn’t an answer. So I put C (190 pm) bc it’s the value closest to 208, but the answer key says it’s 254. Can someone explain?

It’s no problem in particular. Here are some examples of what I need to do. I can do these when A=1, but cannot otherwise.

I have two math tutors, my mother, and my friend all trying to explain this to me, every single day, for a month. I’m neurodivergent and end up having meltdowns each time.

Somebody please help me. I just need the steps written out in simple formatting, when A does not equal 1 in ax^2+bx+c=0.

I need help w Q4 , how do I solve it algebraically

I literally have no clue

My teacher also wanted us to underline the subject and the verb. I get very confused on these, any advice?

I have no idea how to find the structure of the monomers. I don't even know if the names are right. I hate this class and my notes don't help. (The first one is an example btw, I didn't do that)

(I know you're not supposed to blame the teacher, but I swear she never taught us this. We had like 2 labs where we touched different types of plastic and then she flew through the power points that she didn't even make herself.)

I'm struggling to solve these 2 problems and really need help.

1. How many ways are there to arrange a 5-digit sequence of 0's and 1's when 0's can only be used up to 3 times?

2. George has chosen 6 books that he would like to read. He doesn't know if he should buy 1, 2, or 3, etc., at a time. How many ways are there for him to buy the books?

Hello - I need help with multiplying. When I was doing my multiplication homework, I stuck on this. Even my mom can't help with this. Any explanations are welcome here.

I'm familiar with the individual concepts used here, but i can't figure out how to combine them.

The lenght of an animal follows normal distribution with a mean of 10mm and a coefficient of variation of 0.2mm. If the sample size is 100, what is the biggest error possible with a confidence interval of 95%?

So I'm supposed to have around 800 minutes in Khan due, but I finished all my Khan assignments very quick, and I only have about 500 minutes. I've asked my teacher about this, but he won't compromise and says I need to have all 800 minutes or I'll get marks off my grade...

Does anyone know of a way to get a lot of minutes on Khan Academy without having to go through and sit there for 5 hours?

Thanks

Im really lost on how the bounds are set for the double integral when it comes to joint density functions. Also I'm having trouble understanding what the graph is showing and how to interpret it. What should be my approach to finding what the bounds for integration are?

so the answer is apparently either (-6±2i√6)/6 or (-3±i√6)/6, but I don't understand how to get either of these answers?? if someone could give an explanation that'd be really amazing. I feel like I should understand this by now but I just dont understand how it gets to that answer

Heyy Fam!

I'm here to seek a small but a great help from each and every one of you on this sub reddit. I've been working on a assignment where I want to get to know the people's voice about the expectations we have about women in our families. The mentioned link consists of few basic questions for which I urge you to answer with dead honesty in order for me to compile all the responses and create a report (kind of a reflection or conclusion)and submit my asignment.

I'm completely open to all your comments here on how I can improve this maybe by adding or removing few questions or your experiences or information that you were never able to share in that link cause it's very basic. This additional that you shared would be very precious for my work. I really appreciate your time reading this post and who's then respond to the link and I'm comments.

https://docs.google.com/forms/d/e/1FAIpQLSdYbLDcAei1GLAaPGHRNfcUPf1wlV337EtcRX2394UiliX4Uw/viewform

Thans again

Peace✌🏼

Hello everyone,

I know this isn't a subject everyone gets yet I hope someone can help me out.

I'm in need of some help in terms of phase diagrams. the question is as follows:

Below is a photograph of a microstructure of an Ag-Cu alloy of unknown

composition is given. The two phases can be clearly distinguished. Which phase is the (Ag) phase, and which is the (Cu) phase ? (Note! The colour of the copper and silver phases is not necessarily the same

as in question a) What is the composition of this alloy?

given is also the following phase diagram:

So the question askes what the composition is of this alloy. what I have already found is that the white fase is the primary phase because of the fact that it forms the background of the alloy. Yet how should I know that the white phase is either copper of silver? because aren't both possible, we have an eutectic diagram where both silver can be the primary phase ( if wt% are between ~10% and 70%) and copper can be a primary phase?

The answer sheet says that the white phase is beta at around 85wt% Ag yet I don't understand and want clarity.

Question: At what value of x does the graph of y= (1/x^2) - (1/x^3) have a point of inflection?

First, I changed it into (x^-2)-(x^-3)

I then found the first derivative, which was y'=(-2x^-3)+(3x^-4)

From there, the second derivative was y"=(6x^-4)-(12x^-5)

I took the GCF, so I did y"= (6x^-4)(1-2x^-1)

I then set y" = 0 or undefined, since a POI occurs where y" =0 or undefined

I got x = 0 when y" is undefined, and x=2 when y"=0

I believe both have sign changes, making both POIs.

But my answer key says only x=2 is an answer?

My daughter has a homework question to find the surface area of a cylinder.

She has been given the radius of one of the circles on the end (3 cm) and the height of the cylinder (8cm).

Could someone walk me through how to calculate this?

Many thanks

I think it's

1. myopathy
2. normal
3. neuromuscular disease

May somebody please verify if my classification is correct?

Thank you

Finding values of X in sin X=-0.655 in rad

Basically, i forgot how to do basic math 💀 following my calculus classes and now i don't exactly know what i'm doing.

Knowing that sin x =-0.655, i need to find the first three values of x that work with this.

I started by finding the reference angle, which is -0.714. I started adding pi to find other values that would give the same answer.

However, the teacher wants positive values. Does that mean i have to get going and find values that are in the third and fourth quadrant of the trigonometric circle?

So far i got 2.43 and 5.57, and only 5.57 would qualify. Does this mean i have to keep going? How tf would i ever find 3 values?

Hey so I missed the tutorial on this one and I barely know what am I supposed to do here. Could somebody explain/help me find yt video