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3 years ago

At 1:00 the water level in a pool is 13 inches at 2:30 in the water level is 28 inches what is the rate of change

1 answer:

4 0

Let x = time, hours, from 1:00
Let y = water level, inches

Note that from 1:00 to 2:30, x = 2.5 - 1.0 = 1.5 hours.

The given data is
x: 0 1.5
y: 13 28.0

The change in x is 1.5 - 0 = 1.5 hours
he change in y is 28 - 13 = 15 inches

The rate of change is (15 inches)/(1.5 hours) = 10 inches/hour

Answer: 10 inches per hour

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<h3>Distances</h3>

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3 years ago

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4 years ago

How much bigger is the Sum of first 50 even numbers than the sum of first 50 odd numbers?

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Answer:

Step-by-step explanation:

Sum Even numbers

n = 50

d = 2

a1 = 2

The last number is

an = a1 + (n-1)d

an = 2 + (50 - 1)*2

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an = 2 + 98

an = 100

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Sum = (a1 + a50)*n/ 2

Sum = (2 + 100)*50/2

sum = 102 * 25

sum = 2550

Sum of the first 50 odd numbers

a1 = 1

n = 50

d = 2

l = ?

Find l

l = a1 + (n - 1)*2

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l = 99

Sum

Sum = (1 + 99)*50/2

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