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3 years ago

How many 3-digit numbers with all even digits.

1 answer:

6 0

For the first digit, you have 4 choices (2, 4, 6, 8); for the second and third digits, you have 5 choices (2, 4, 6, 8 and 0). So the total number of positive qualifying numbers is 4*5*5 = 100

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Hotel managers wish to learn the average length of stay of all visitors that are senior citizens. A statistician determines that

LiRa [457]

The answer & explanation for this question is given in the attachment below.

8 0

3 years ago

The high school graduating class of 2010 was 260 people. Five years later the high school graduating class was 320 people. By ap

jeka94

Answer:

The high school graduating class changed by approximately 23%

Step-by-step explanation:

we have

The high school graduating class of 2010 was 260 people

Five years later the high school graduating class was 320 people.

we know that

260 people represent the 100%

The difference is (320-260)=60 people

using proportion

Find out what percentage represent 60 people

Let

x ----> the percentage that represent 60 people

$\frac{260}{100\%}=\frac{60}{x}\\\\x= 100\%(60)/260\\\\x=23.1\%$

therefore

The high school graduating class changed by approximately 23%

3 0

3 years ago

If C(m) = 0.50m + 30 represents the cost of renting a car, how many miles were driven if cost is $130

FinnZ [79.3K]

Answer:

m=#miles

so 130= .5m+30

subtract 30 from each side

100$= .5m than divide .5 to isolate m

m= 200

Step-by-step explanation:

3 0

3 years ago

Grain is falling from a chute onto the ground, forming a conical pile whose diameter is always three times its height. how high

bezimeni [28]

Given that grain is falling from a chute onto the ground, forming a conical pile whose diameter is always three times its height.

So if D is the diameter and h is the height of the conical pile then we can write:

D=3h

We know that diameter = 2r, where r is the radius

2r=3h

$r=\frac{3h}{2}$

Volume of conical pile is given by formula

$V=\frac{1}{3}\pi r^2h$

Given that volume is 1110 cubic feet.

Now plug the values of Volume and r into equation of volume

$1110=\frac{1}{3}\pi (\frac{3h}{2})^2h$

$1110=\frac{1}{3}\pi\cdot\frac{9h^2}{4}\cdot h$

$1110=\pi\cdot\frac{3h^3}{4}$

$1110\cdot\frac{4}{3\pi}=h^3$

$471.098631552=h^3$

take cube root of both sides

7.78103342467=h

Hence height is approx 7.78 feet.

7 0

3 years ago

What's 2,000 times 4,000???

AnnyKZ [126]

Answer:

8000000

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers