2 years ago

What is the approximate surface area of the sphere?

Mathematics

1 answer:

Misha Larkins [42]2 years ago

3 0

The approximate surface area of the sphere is 94.2 squared

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Thepotemich [5.8K]

Answer:

15x^2-3x-1

Step-by-step explanation:

All we have to do is collect like terms and calculate! Hope this helps!

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1 year ago

Use the lim f(x)-f(a)/x-a to find the derivative.

Tresset [83]

Hello,

f(x)-f(a)= -3x²-5x+1-(-3a²-5a+1)=-3(x²-a²)-5(x-a)=-3(x-a)(x+a)-5(x-a)
=-(x-a)(3(x+a)+5)
=-(x-a)(3x+3a+5)

lim (f(x)-f(a))/(x-a)=- lim (3x+3a+5)=3a+3a+5=-6a-5
if a=1==>-6*1-5=-11

Otherwise
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f'(1)=-6-5=-11

at point(1,-7)

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2 years ago

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kaheart [24]

Answer:i would help but the picture is tooooo blurry

Step-by-step explanation:

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3 years ago

What sample size is needed to give a margin of error within plus-or-minus 5% in estimating a population proportion with 90% conf

VARVARA [1.3K]

Answer: 271.

Step-by-step explanation:

When the prior population proportion of success is not available, then the formula to find the sample size is given by :-

$n=00.25(\dfrac{z_{\alpha/2}}{E})^2$

Given : Significance level : $\alpha: 1-0.90=0.1$

By using the standard normal distribution table ,

Critical value : $z_{\alpha/2}=1.645$

Margin of error : $E=0.05$

Then , the required minimum sample size will be :-

$n=0.25(\dfrac{(1.645)}{0.05})^2=270.6025\approx271$

Hence, the required minimum sample size is 271.

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2 years ago

A basketball player made baskets on 60% of her attempts. If she attempted 42 throws, how many baskets did she make?

iris [78.8K]

Answer:

26 shots.

Step-by-step explanation:

60% of 42 is 25.2 but you can't make .2 of a shot so you have to round up.

4 0

2 years ago