Question

Help I started out with the equation 610x^-1/2
and then got the derivative which is (1/2)(610x)^-3/2
and then they said that x=63 for some reason I keep getting the wrong answer when I plug in the 63 did I solve the derivative incorrectly or what am I doing incorrectly please help!

Answer 1

ur missing out a minus sign befr the derivative

Answer 2

I tried that I am still getting the answer wrong

Answer 3

whtre they asking for?

Answer 4

What the derivative of the equation would equal when x=63

Answer 5

I thought it was 19215^(-3/2) But that was incorrect did I multiply it wrong?

Answer 6

sorry meant to put a negative in front of that 19215

Answer 7

-0.5 x (610x63)^(-3/2)

Answer 8

@AJW99 You should post the original question!

Answer 9

I still got the same answer

Answer 10

The original question was A person x inches tall has a pulse rate approximately given by the function y=610x^(-1/2). The instantaneous rate of change of the pulse rate for a person that is 63 inches tall is?

Answer 11

When I solved it for a man who is 34 inches tall I got -16470^-3/2
But, I don't remember how I did this.

Answer 12

I agree with @him1618 solution!

Answer 13

I tried that but it still returned the wrong answer what am I doing wrong

Answer 14

= - 305 / 63 √63
= - .61

Answer 15

That is still not coming out as the right answer.

Answer 16

It depends on how many decimal point or the question refers to keep fraction form!

Answer 17

My point is this question is pretty straight forward formula, and simple calculation!