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2 years ago

I need help with this

Mathematics

2 answers:

n200080 [17]2 years ago

8 0

Multiplication, addition, subtraction

Sever21 [200]2 years ago

8 0

Answer: Multiplication, subtraction, addition or multiplication, addition, subtraction. It doesn't matter which one you will get the same answer.

Step-by-step explanation:

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ValentinkaMS [17]

Answer:

"impossible"

Step-by-step explanation:

I think. :/

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3 years ago

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Sally finds a coin with a radius of 1.5 centimeters and a thickness of 0.25 cm. It has a measured mass of 18.54 grams. How can S

mote1985 [20]

Answer:

Silver

Step-by-step explanation:

Find the volume of the coin

Volume of a cylinder

$\textsf{V}=\sf \pi r^2 h \quad\textsf{(where r is the radius and h is the height)}$

Given:

r = 1.5 cm
h = 0.25 cm

Substituting given values into the formula to find the volume:

$\sf \implies V=\pi (1.5)^2(0.25)$

$\sf \implies V=0.5625 \pi \:cm^3$

Find the density of the coin given it has a measured mass of 18.54 g

Density formula

$\sf \rho=\dfrac{m}{V}$

where:

$\rho$ = density
m = mass
V = volume

Given:

m = 18.54 g
$\sf V=0.5625 \pi \:cm^3$

Substituting given values into the density formula:

$\implies \sf \rho=\dfrac{18.54}{0.5625 \pi}$

$\implies \sf \rho=10.49149385\:g\:cm^{-3}$

Given:

$\textsf{Density of Lead}=\sf 11.3\:g\:cm^{-3}$

$\textsf{Density of Silver}=\sf 10.49\:g\:cm^{-3}$

Therefore, as $\sf \rho=10.49\:g\:cm^{-3}$ the coin is made from silver.

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2 years ago

Find the probability of landing on an even number when spinning the spinner below.

Mariulka [41]

Answer:

There are 8 numbers.

4 of the numbers are even ( 2, 4, 6, 8)

The probability is the number of even numbers over the total numbers:

4/8 which reduces to 1/2.

The answer is 1/2

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3 years ago

I rlly need help, pllzzzzzzzzzzzzzz 10 points

algol [13]

the answer is 1,050 ft2

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2 years ago

What is the approximate area of the figure 5 feet and 15 feet

zhenek [66]

Answer:

75 ft^2

Step-by-step explanation:

I assume you mean a 5 ft x 15 ft rectangle. That's 5*15

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3 years ago

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