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3 years ago

А)

Mathematics

1 answer:

Nookie1986 [14]3 years ago

6 0

Answer:

Step-by-step explanation:

surface area of sphere=a

4pir^2=a

r^2=a/4p

r=root(a/4pi)

if radius is doubled

r1=2root(a/4pi)

r1^2=4(a/4pi)

a/a1=(4pia/4pi)/(4pi 4a/4pi)=1/4

so a is increased by 4 times

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How do you calculate slope in pre algebra

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Answer:

Find the slope from a graph

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3 years ago

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3 years ago

The sum of 2 numbers is 49. The second number is 15 less than the first number. The first number is

liubo4ka [24]

Answer:

x + y = 49

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Step-by-step explanation:

The sum of 2 numbers is 49 means that x+y = 49. (The two numbers are x and y, and the sum of them are 49.)

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3 years ago

Read 2 more answers

Forensic specialists can estimate the height of a deceased person from the lengths of the person's bones. These lengths are subs

Lera25 [3.4K]

Answer:

$130.2845\leq h\leq 137.7245$

Step-by-step explanation:

Given an inequality that relates the height h, in centimeters, of an adult female and the length f, in centimeters, of her femur by the equation

$|h - (2.47f + 54.10)| \leq 3.72$

If an adult female measures her femur as 32.25 centimeters, we can determine the possible range of her height by plugging f = 32.25cm into the modelled equation as shown:

$|h - (2.47(32.25) + 54.10)| \leq 3.72\\|h - (79.9045 + 54.10)| \leq 3.72\\|h - (134.0045)| \leq 3.72\\$

If the modulus function is positive then:

$h - 134.0045 \leq 3.72\\h \leq 3.71+134.0045\\h\leq 137.7245$

If the modulus function is negative then:

$-(h - 134.0045) \leq 3.72\\-h+134.0045 \leq 3.72\\-h\leq 3.72-134.0045\\-h\leq -130.2845\\$

multiply through by -1

$-(-h)\geq -(-130.2845)\\h\geq 130.2845\\130.2845\leq h$

combining the resulting inequalities, the estimate of the possible range of heights will be $130.2845\leq h\leq 137.7245$

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3 years ago

What is 5.4/7=27/h what is h =

VashaNatasha [74]

5.4/7=27/h

We simplify the equation to the form, which is simple to understand
5.4/7=27/h

We move all terms containing h to the left and all other terms to the right.
-1h=-0.77142857142857

We simplify left and right side of the equation.
-1h=-0.77142857142857

We divide both sides of the equation by -01 to get h.
h=0.77142857142857

4 0

3 years ago