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4 years ago

11

An album was purchased online for 12 dollars, but the company charged a 20% commission for providing it to its customers. How mu

ch did the music company collect for the album?

1 answer:

eimsori [14]4 years ago

6 0

Answer:

2.4 dollars

12 x .20 = 2.4

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The function f(x)=70n -400 models the profit of the instructor of a guitar class per month, where n is the number of students en

Ymorist [56]

Answer:

At least 6 students must be enrolled in the class for the instructor to make a profit.

At least 20 students must be enrolled in the class for the instructor to make $1,000 (or more) profit per month.

Step-by-step explanation:

The function $f(x)=70n -400$ models the profit of the instructor of a guitar class per month.

1. If the instructor makes a profit, then

$f(x)>0\\ \\70n-400>0\\ \\7n-40>0\\ \\7n>40\\ \\n>\dfrac{40}{7}\\ \\n>5\dfrac{5}{7}$

So, at least 6 students must be enrolled in the class for the instructor to make a profit.

2. If the instructor needs to make 1,000.00 profit per month, then

$f(x)\ge 1,000\\ \\70n-400\ge 1,000\\ \\7n-40\ge 100\\ \\7n\ge 140\\ \\n\ge \dfrac{140}{7}\\ \\n\ge 20$

So, at least 20 students must be enrolled in the class for the instructor to make $1,000 (or more) profit per month.

5 0

4 years ago

HELPPPP look at imag

nikklg [1K]

Answer:

the answer is D

Step-by-step explanation:

dram is 40 film is 24 40 divided by 8 is 5 and 24 divided by 8 is 3 so it equals 5:3

3 0

3 years ago

he lengths of a particular animal's pregnancies are approximately normally distributed, with mean muequals252 days and standar

Rashid [163]

Answer:

Step-by-step explanation:

Let X be the lengths of a particular animal's pregnancies

X is N(252, 20)

(a) What proportion of pregnancies lasts more than 262 days?

$P(X>262) = 0.3085$

(b) What proportion of pregnancies lasts between 227 and 257 days?

$P(227$

(c) What is the probability that a randomly selected pregnancy lasts no more than 237 days?

P(X<237) = 0.2266

(d) A "very preterm" baby is one whose gestation period is less than 202 days. Are very preterm babies unusual?

$P(X$

Yes very unusual since probability is very near to 0.

7 0

4 years ago

Read 2 more answers

By which smallast number must the following number be divided so that the quotient is a perfect cube

jenyasd209 [6]

Answer:

60

Step-by-step explanation:

8640/60 is 144. 144 is a perfect square. 12*12 is 144

8 0

3 years ago

Read 2 more answers

in a recent year in the united state, 83, 600 passengers car rolled over when they crashed, and 5,127,400 passengers cars did no

alexdok [17]

Answer:

0.01 probability of a car rolling over in a crash.

It is very unlikely for a car to roll over in a crash.

Step-by-step explanation:

Let E be any event.

Then, the probability of happening of an event E = $\frac{\textrm{Number of favorable outcomes}}{\textrm{Total Outcomes}}$

Now here,

Let E1 = The event where cars rolled when they crashed

E2 = The event where cars did not roll when they crashed

The number of cars that did roll = 83, 600

The number of cars that did not roll = 5,127,400

So, total number of cars taken into account for any event

= 83, 600 + 5,127,400 = 5,211,000

So, P(E1) = 83, 600 / 5,211,000 = 0.01

Hence there is 0.01 probability of a car rolling over in a crash.

and P(E2) = 5,127,400 / 5,211,000 = 0.98

Since P(E2) is way way more than that of P(E1)

Hence, it is very unlikely for a car to roll over in a crash.

4 0

3 years ago