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2 years ago

14

The height of a cylinder is three times the diameter of the base. The surface area of the cylinder is 126 PI squared feet. What

is the radius of the base?

1 answer:

lozanna [386]2 years ago

3 0

30

you have to do the math of 9x2=18 then you add 12 to your answer and your answer is 30

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Joe read 140 pages of his 300 page book what percent of his book has he read

kaheart [24]

Answer:

47

Step-by-step explanation:

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2 years ago

Plans Math Fourth grade > W.4 Parallel sides in quadrilaterals 58M How many pairs of opposite sides are parallel? no pairs 1

AURORKA [14]

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2 pairs

Step-by-step explanation:

The north & south sides are parallel and the east & west are parallel.

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2 years ago

How do you write 41,300 in scientific notation?

Nuetrik [128]

Answer: 4.13 x 10^4

Step-by-step explanation: You have to just count the places such as the tens all the way to the thousands which leaves you with the exponent of 4.

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2 years ago

Read 2 more answers

The population, P(t), of China, in billions, can be approximated by1 P(t)=1.394(1.006)t, where t is the number of years since th

vitfil [10]

Answer:

At the start of 2014, the population was growing at 8.34 million people per year.

At the start of 2015, the population was growing at 8.39 million people per year.

Step-by-step explanation:

To find how fast was the population growing at the start of 2014 and at the start of 2015 we need to take the derivative of the function with respect to t.

The derivative shows by how much the function (the population, in this case) is changing when the variable you're deriving with respect to (time) increases one unit (one year).

We know that the population, P(t), of China, in billions, can be approximated by $P(t)=1.394(1.006)^t$

To find the derivative you need to:

$\frac{d}{dt}\left(1.394\cdot \:1.006^t\right)=\\\\\mathrm{Take\:the\:constant\:out}:\quad \left(a\cdot f\right)'=a\cdot f\:'\\\\1.394\frac{d}{dt}\left(1.006^t\right)\\\\\mathrm{Apply\:the\:derivative\:exponent\:rule}:\quad \frac{d}{dx}\left(a^x\right)=a^x\ln \left(a\right)\\\\1.394\cdot \:1.006^t\ln \left(1.006\right)\\\\\frac{d}{dt}\left(1.394\cdot \:1.006^t\right)=(1.394\cdot \ln \left(1.006\right))\cdot 1.006^t$

To find the population growing at the start of 2014 we say t = 0

$P(t)' = (1.394\cdot \ln \left(1.006\right))\cdot 1.006^t\\P(0)' = (1.394\cdot \ln \left(1.006\right))\cdot 1.006^0\\P(0)' = 0.00833901 \:Billion/year$

To find the population growing at the start of 2015 we say t = 1

$P(t)' = (1.394\cdot \ln \left(1.006\right))\cdot 1.006^t\\P(1)' = (1.394\cdot \ln \left(1.006\right))\cdot 1.006^1\\P(1)' = 0.00838904 \:Billion/year$

To convert billion to million you multiple by 1000

$P(0)' = 0.00833901 \:Billion/year \cdot 1000 = 8.34 \:Million/year \\P(1)' = 0.00838904 \:Billion/year \cdot 1000 = 8.39 \:Million/year$

6 0

2 years ago

Jamie has 7/10 of a pound of chicken to cook for dinner if she's going to split the chicken between three people how much chicke

Fed [463]

7/30 pound of chicken. Since 7 is not divisible by 3, you will have to express 7/10 as 21/30 as 21 is divisible by 3.
21/30 divided by 3 people is 7/30
Thus each person gets 7/30 pounds of chicken

3 0

2 years ago