Someone help me please?

Mathematics

2 answers:

zaharov [31]3 years ago

7 0

Hourly rate for Hairstyles = 80/15 = $5.33

Babysitting hourly rate = 250 / 40 = $6.25

Frank Furter hourly rate = $5.67

Thus, Babysitting is best hourly rate.

Maurinko [17]3 years ago

6 0

The answer to your question is,

Babysitting. If you take $250 and divide it by 40, since it is the monthly rate of how much the person would earn, it would mean you'd get $6.25 hourly. The first is $5.67, and the second is $5.33.

-Mabel <3

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An owner of a key rings manufacturing company found that the profit earned (in thousands of dollars) per day by selling n number

vovikov84 [41]

Answer:

The number of key rings sold on a particular day when the total profit is $5,000 is 4,000 rings.

Step-by-step explanation:

The question is incomplete.

An owner of a key rings manufacturing company found that the profit earned (in thousands of dollars) per day by selling n number of key rings is given by

$P=n^2-2n-3$

where n is the number of key rings in thousands.

Find the number of key rings sold on a particular day when the total profit is $5,000.

We have the profit defined by a quadratic function.

We have to calculate n, for which the profit is $5,000.

$P=n^2-2n-3=5\\\\n^2-2n-8=0$

We have to calculate the roots of the polynomial we use the quadratic equation:

$n=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\\\n= \frac{-2\pm\sqrt{4-4*1*(-8)}}{2}= \frac{-2\pm\sqrt{4-32}}{2} = \frac{-2\pm\sqrt{36}}{2} =\frac{-2\pm6}{2} \\\\n_1=(-2-6)/2=-8/2=-4\\\\n_2=(-2+6)/2=4/2=2$