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3 years ago

Does anyone know I need help

Mathematics

1 answer:

geniusboy [140]3 years ago

6 0

Answer:

7.9% reduction.

Step-by-step explanation:

Kerrin's initial weight can be calculated by 13(14)+7=189 pounds.

Three months later he weighs 12(14)+6=174 pounds.

The difference between 189 and 174 is 15 pounds.

$\frac{15}{189}$ ≈.0793651 or 7.9%.

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Find the volume of the solid of revolution generated by revolving the region bounded by y = 2x^2, y = 0, and x = 2 about the x-a

Irina18 [472]

Answer:

$128 \pi/5 units^3$

Step-by-step explanation:

The volume of the solid revolution is expressed as;

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3 years ago

4. Which value of x makes the equation true? 0.4(5 - 2x) = 3 -0.6(x - 1)

o-na [289]

Step-by-step explanation:

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3 years ago

Does anybody know this

Dmitrij [34]

Step-by-step explanation:

The equation used to determine the amount of radioactive material left is

$A = A_0(2)^{-t/HL}$

We are have the following given quantities:

t = 30 seconds

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Plugging these into our equation we get

$A = (50\:\text{grams})(2)^{-(30s/6s)}$

$\:\:\:\:= (50\:\text{grams})(0.03125)$

$\:\:\:\:= 1.56\:\text{grams}$

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2 years ago