How many times larger is the radius of a mercury atom, 1.50 x 10-10, than the radius of a hydrogen atom, 2.5 x 10-11?

Answers

Answer 1

Answer: mercury atom: 1.5 x 10^-10
hydrogen atom: 2.5 x 10^11

standard form:
mercury atom 0.00000000015
hydrogen atom 0.000000000025

0.00000000015 / 0.000000000025 = 6

the radius of a mercury atom is 6 times larger than the radius of a hydrogen atom.

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The resting heart rates for 80 women aged 46–55 in a simple random sample are normally distributed, with a mean of 71 beats per minute and a standard deviation of 6 beats per minute. Assuming a 90% confidence level, what is the margin of error for the population mean? 0.66 1.10 1.31 1.73

Answers

Given:
Confidence level = 90%
mean = 71 beats per minute
standard deviation = 6 beats per minute

margin of error = z * δ / √n

where : δ - population of the standard deviation, n is the sample size ; z is the appropriate z value.

90% confidence level = 1.645 in z-value

margin of error = 1.645 * (6/√80) = 1.645 * (6/8.94) = 1.645 * 0.671 = 1.104

The margin of error is 1.10

An average football field has the dimensions of 160 ft by 360 ft. If the expressions to find these dimensions were (3x + 7) and (7x + 3) what value of would give the dimensions of the football field ?

Answers

Answer:

Step-by-step explanation:

Because that's what it is i might be wrong tho lol

ANSWER:47

HOW I GOT THE ANSWER:I think it the best because it make most sense and it seems correct hope this helps u it took long to get

One root of the quadratic equation x^2 − 2x + m = 0 is 9. If the other root is n, what is n−m?

Answers

$9^2-2*9+m=0\n \n 81-18+m=0\n \n m=-63$

$x^(2) -2x-63=0\n \n \Delta=(-2)^2-4.1.(-63)=4+252=256\n \n x=(2 \pm 16)/(2)\n \n x_1=(18)/(2)=9\n \n n=x_2=(-14)/(2)=-7\n \n n-n=-7-(-63)=-7+63=56$

Graph the function. Identify the vertex and axis of symmetry
f(x) = –x2 – x + 2

Answers

I hope this is right (-5) + (-4) + (7);
= -9 + 7;
= -2

To make concrete it takes 8 parts crushed gravel, 7 parts water and 5 parts cement mix. A worker needs to make 220kg of concrete. How much crushed gravel, water and cement mix is needed?Thanks!!!

Answers

a) 8 + 7 + 5 = 20 parts
b) 220 kg ÷ 20 = 11
c) 8 parts crushed gravel: 8 x 11 = 88 kg
7 parts water: 7 x 11 = 77 kg
5 parts cement: 5 x 11 = 55 kg

Ava's wages were $985.50. What is the amount after 15% Federal Withholding income tax is deducted? Round to the nearest cent.

Answers

985.50 multiplied by .15 then subtract the answer from 985.50 and that is your remainder

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