3 years ago

PLZ HELP ASAP!!!!!!

Mathematics

1 answer:

Whitepunk [10]3 years ago

3 0

Answer:

radius is 7yd, height is 4 yd, v=3.14 x 7^2 x 4. The last one, I'm not too sure about but it might be V= 615.44^3

Step-by-step explanation:

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2 step equations 5x+7=27 2p-15=35 c/2-15=-5 Please help

kvasek [131]

5x + 7 = 27

5x = 27 - 7
5x = 20
x = 20 ÷ 5
x = 4

2p - 15 = 35

2p = 35 + 15
2p = 50
p = 50/2
p = 25

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A line that includes the point (-9, 1) has a slope of 1. What is its equation in

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Answer:

y=x+10

Step-by-step explanation:

1.) y-1=1(x+9)

2.) y-1=x+9

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Find the midpoint of pq

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Answer:

where is the graph

Step-by-step explanation:

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2 years ago

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The world population at the beginning of 1980 was 4.5 billion. Assuming that the population continued to grow at the rate of app

AfilCa [17]

Answer:

$Q(t) = 4.5(1.013)^{t}$

The world population at the beginning of 2019 will be of 7.45 billion people.

Step-by-step explanation:

The world population can be modeled by the following equation.

$Q(t) = Q(0)(1+r)^{t}$

In which Q(t) is the population in t years after 1980, in billions, Q(0) is the initial population and r is the growth rate.

The world population at the beginning of 1980 was 4.5 billion. Assuming that the population continued to grow at the rate of approximately 1.3%/year.

This means that $Q(0) = 4.5, r = 0.013$

$Q(t) = Q(0)(1+r)^{t}$

$Q(t) = 4.5(1.013)^{t}$

What will the world population be at the beginning of 2019 ?

2019 - 1980 = 39. So this is Q(39).

$Q(t) = 4.5(1.013)^{t}$

$Q(39) = 4.5(1.013)^{39} = 7.45$

The world population at the beginning of 2019 will be of 7.45 billion people.

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Mary has 3 red marbles and 7 yellow marbles in a bag. What is the probability of she draw 3 marbles at the same time, all of the

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The probability would be 3/10 or 30%

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