Amy drove to her mother's house, which is
2 answers:
You might be interested in
Answer:
Step-by-step explanation:
Total number of toll-free area codes = 6
A complete number will be of the form:
800-abc-defg
Where abcdefg can be any 7 numbers from 0 to 9. This holds true for all the 6 area codes.
Finding the possible toll free numbers for one area code and multiplying that by 6 will give use the total number of toll free numbers for all 6 area codes.
Considering: 800-abc-defg
The first number "a" can take any digit from 0 to 9. So there are 10 possibilities for this place. Similarly, the second number can take any digit from 0 to 9, so there are 10 possibilities for this place as well and same goes for all the 7 numbers.
Since, there are 10 possibilities for each of the 7 places, according to the fundamental principle of counting, the total possible toll free numbers for one area code would be:
Possible toll free numbers for 1 area code = 10 x 10 x 10 x 10 x 10 x 10 x 10 =
Since, there are 6 toll-free are codes in total, the total number of toll-free numbers for all 6 area codes =
The formula for the volume of a sphere is the following:
Plug in V=5000π and solve for the radius.
Divide both sides by
Multiply both sides by 3/4 (to eliminate the 4/3 on the right side)
Also, flip the equation so we have the unknown variable on the left side (math etiquette).
Take the cube root of both sides
Now, calculate the surface area since now we know the radius.
The formula for the surface area is the following:
Plug in r=15.5
The second choice is your answer.
Plug in V=5000π and solve for the radius.
Divide both sides by
Multiply both sides by 3/4 (to eliminate the 4/3 on the right side)
Also, flip the equation so we have the unknown variable on the left side (math etiquette).
Take the cube root of both sides
Now, calculate the surface area since now we know the radius.
The formula for the surface area is the following:
Plug in r=15.5
The second choice is your answer.