3 years ago

Jessica earned $14 by baby sitting 4 hours What's Jessica rate and Jessica's Unit Rate?

Mathematics

1 answer:

Fofino [41]3 years ago

5 0

Answer:

$3.50

Step-by-step explanation:

14 ÷ 4 = 3.5

<em>good luck, i hope this helps :) </em>

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A person earns $16 one year and gets a 5% raise in salary. what is the new salary?

yaroslaw [1]

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4 years ago

One estimate of the population of the world on January 1, 2005, is 6,486,915,022. The population is estimated to be increasing a

luda_lava [24]

The answer is <span>8,686,308,783.</span>

To calculate this, we will use the equation for exponential function:
$y=x(r+1) ^{n}$
y - the future population
x - the current population
r - the rate of increasing the population
n - the number of years

It is given:
x = 6,486,915,022
r = 1.4% = 0.014
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Therefore:
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3 years ago

at haydens school there is 1 teacher for every 15 students.There are 630 students at the school. What proporation can be used to

Bess [88]

Answer:

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Step-by-step explanation:

$\frac{a}{b}=\frac{c}{d}$

$\frac{1}{15} =\frac{x}{630} \\15x=630\\x=\frac{630}{15} \\x=42$

6 0

3 years ago

2+(x+y)=(2+x)+y is an example of what algebraic property

denpristay [2]

Answer:

communicative property

Step-by-step explanation:

3 0

3 years ago

How did he get this 1/2i ? I dont remember studying this definition in calc 1 neither calc 2!

Hitman42 [59]

The $i$ in the denominator is missing in the second expression. It should be

$\sin at=\dfrac{e^{iat}-e^{-iat}}{2i}$

This follows from

$e^{iat}=\cos at+i\sin at$
$e^{-iat}=\cos at-i\sin at$
$\implies e^{iat}-e^{-iat}=2i\sin at$
$\implies \sin at=\dfrac{e^{iat}-e^{-iat}}{2i}$

8 0

4 years ago