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gladu [14]
2 years ago
15

A number y is multiplied by -0.8. The product is -49. What is the value of y?

Mathematics
1 answer:
Crank2 years ago
4 0
(-0.8)y = -49

Divide both sides by -0.8

y=61.25
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3 dregreess 5 degrees temperature

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Solve the proportion equation. X 10 45 9 = X = (Type a whole number or a decimal.) ​
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3 years ago
What is the area of a pizza with a diameter of 12 inches? Round to the nearest tenth. Use 3.14 for pi.
Flauer [41]

Answer:

\boxed {\boxed {\sf a \approx 113.0 \ in^2}}

Step-by-step explanation:

Assuming this pizza is a circle, we can use this formula for area:

a= \pi r^2

1. Find Radius

We are given the diameter: 12 inches, but the formula uses radius.

The radius is half the diameter, or:

r=\frac{d}{2}

r=\frac{12 \ in}{2}

r= 6 \ in

2. Calculate Area

Substitute the radius (6 inches) in for r. The question also asks us to use 3.14 for pi.

a= (3.14)(6 \ in)^2

Solve the exponent.

  • (6 in)²= 6 in* 6 in= 36 in²

a= (3.14)(36 \ in^2)

Multiply.

a= 113.04 \ in^2

3. Round

The question asks us to round to the nearest tenth.

The 4 in the hundredth place tells us to leave the 0 in the tenth place.

a \approx 113.0 \ in^2

The area of the pizza is about 113.0 square inches.

7 0
3 years ago
A medical study investigated the effect of calcium and vitamin supplements on the risk of older Americans for broken bones. A to
Korolek [52]

Answer:

Fraction of older Americans who were included in the study and suffered broken bones during the three-year period = (37/389) = 0.0951

Step-by-step explanation:

The fraction of older Americans who were included in the study and suffered broken bones during the three-year period?

This fraction = (Number of older Americans who suffered broken bones recorded during the three year period of the study)/(Total number of older Americans involved in the study)

Number of older Americans who suffered broken bones recorded during the three year period of the study = (11 from those that took the additional supplements) + (26 from those that did not take additional supplements) = 11 + 26 = 37

Total number of older Americans involved in the study = 389

Fraction of older Americans who were included in the study and suffered broken bones during the three-year period = (37/389) = 0.0951

7 0
3 years ago
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