3 years ago

7m or 7.7 m which is more precise?

Mathematics

1 answer:

Karolina [17]3 years ago

7 0

7.7 meters is more precise.

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The Coopers own two vehicles, a mini-van and sedan. The following functions represent the resale value of both cars, in thousand

velikii [3]

Answer:

$h(x) = 57(0.8)^x$

Step-by-step explanation:

Given

$f(x) = 32(0.8)^x$

$g(x) = 25(0.8)^x$

Required

A function that represents the total resale value of the two vehicles

To do this, we simply add up the functions

$h(x) = f(x) + g(x)$

$h(x) = 32(0.8)^x + 25(0.8)^x$

Factorize

$h(x) = (32 + 25)(0.8)^x$

$h(x) = 57(0.8)^x$

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3 years ago

What is the derivative of te^-t/2

salantis [7]

Y = t*e^(-t/2)

y' = t' [e^(-t/2)] + t [e^(-t/2)]' = e^(-t/2) + t[e^(-t/2)][-1/2]=

y' = [e^(-t/2)] [1 - t/2] = (1/2)[e^(-t/2)] [2 - t] = - (1/2) [e^-t/2)] [t -2]

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3 years ago

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How many times can 42 go into 400?

ki77a [65]

400 divided by 42 = 9.523809

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3 years ago

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Pls answer quickly

Effectus [21]

The answer would be C (9/16)

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2 years ago

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Show that the following number is rational: 7.526262626... show all work, discrete math

Lemur [1.5K]

$x=7.5\overline{26}\\10x=75.\overline{26}\\1000x=7526.\overline{26}\\1000x-10x=7526.\overline{26}-75.\overline{26}\\990x=7451\\x=\dfrac{7451}{990}$

It can be expressed as a fraction with integer numerator and denominator, so it's a rational number.

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3 years ago