All categories

3 years ago

The circumference of a circle is 28 x inches. What is the length of the radius of this circle?

Mathematics

1 answer:

meriva3 years ago

4 0

Answer: 14

Explanation: The radius is half of the value of the circumference.

You might be interested in

Can someone solve 8 = b - 1 + 8b STEP BY STEP PLEASE

andrew11 [14]

Answer:

8 = b - 1 + 8b

group like terms

8 + 1 = b + 8b

9 = 9b cus b standing alone me 1b

divide both side by 9

9 = 9b

9 9

b = 1

7 0

3 years ago

Write the explicit rule for the nth term. Then find a71. {O, -8, -16, -24 ...}

yulyashka [42]

Answer:

Step-by-step explanation:

{0, -8, -16, -24,...} here you add -8 each time so the rule is

$a_{1} = 0, a_{n} = a_{n-1} -8$

the 71 term is

$a_{71} = 0 + (71 - 1) * (-8) = 70 * (-8) = -560$

3 0

3 years ago

Brainliest + 20 points to whoever helps!!!

Darya [45]

Answer:

D. The standard deviation is known and n > 30.

Step-by-step explanation:

Your sample size is greater than 30.
Data points should be away from each other.
Your data should be commonly categorized.
Your data should be randomly picked from a population. Each item should have an equal chance of being selected.
The sample sizes should be equal.

8 0

3 years ago

-4/9(-7/9) =_______?

Setler79 [48]

Multiply straight across (neg times a neg = a positive)
=28/81

6 0

3 years ago

In 1980, the average cost of a pack of cigarettes was $0.88. In 2000, the average cost was $5.31 per pack.

yan [13]

Answer:

The average rate of change of the cost of a pack is 22 cents per year.

Another name for the average rate of change is slope.

Step-by-step explanation:

The average rate of change of the cost of a pack ( $r$ ), in monetary units per year, is equal to the change in the average cost of a pack ( $\Delta c$ ), in monetary units, divided by the change in time ( $\Delta t$ ), in years. Then, the average rate of change is:

$r = \frac{\$\,5.31-\$\,0.88}{2000-1980}$

$r = \$\,0.22\,\frac{1}{yr}$

The average rate of change of the cost of a pack is 22 cents per year.

Another name for the average rate of change is slope.

8 0

3 years ago