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2 years ago

I’m not sure how to do this any help would be great

Mathematics

1 answer:

KIM [24]2 years ago

4 0

Answer:

785.4cm^3

Step-by-step explanation:

(10÷2)^2*π=25π

25π*10=250π≈785.4

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A random sample of 133 people was taken from a very large population. Sixty-five of the people in the sample were females.The st

rjkz [21]

Answer: 0.0433

Step-by-step explanation:

Given: Sample size : n= 133

The number of females in sample = 65

Then the proportion of females : $P=\dfrac{65}{133}$

The formula to calculate the standard error of the proportion is given by :-

$S.E.=\sqrt{\dfrac{P(1-P)}{n}}$

$\Rightarrow S.E.=\sqrt{\dfrac{\dfrac{65}{133}(1-\dfrac{65}{133})}{133}}\\\\\Rightarrow\ \Rightarrow S.E.=0.0433444676341\approx0.0433$

Hence, the standard error of the proportion of females is 0.0433.

6 0

3 years ago

What is 5.75 divide by 0.08

Luba_88 [7]

Answer:

71.875

use long division so the 5.75 goes on top of the 0.08

3 0

3 years ago

Hannah buys 2 and one half pounds of dried fruit for $1.50. how much is she paying for one pound of dried fruit?

jeka57 [31]

She is paying $0.6 for one pound of dried food. Hope it help!

7 0

3 years ago

What is the equation of the quadratic graph with a focus of (3, −1) and a directrix of y = 1?

Tomtit [17]

Use our brains and what we know
f(x)=a(x-h)²+k
vetex is (h,k)
and a is te leading coefient

if directix is below the focus, then it opens up and a is positive
if directix is above focus, then it opens down and a is negaitve

vertex is in between directix and focus

so
(3,-1) and y=1
-1<1
so directix is above
a is negative

directly in between
distance from -1 to 1 is 2
2/2=1

1 above (3,-1) is (3,0)
vertex is (3,0)

y=a(x-3)²+0
y=a(x-3)²

the only option with a negative 'a' value is B

answer is B

5 0

3 years ago

Read 2 more answers

A train traveled 300 miles in 5 hours. find its rate of speed in miles per hour.

melomori [17]

Answer:

60 miles per hour

Step-by-step explanation:

$Speed = \frac{Distance}{Time}$

You divide 300 by 5 and you get 60. You always need to divide the upper part to the lower part to reach the distance in ONE UNIT OF TIME. There, you have 5 seconds, yet you need the distance in 1 second.

This all is assuming that the train moved at a constant speed, where

ACCELERATION = 0, which is pretty improbable for a train.

8 0

3 years ago