Derek reads at a rate of 25 words per minute. if he reads constantly until he is finished, how long would it take him to read a 225 word article?

9 minutes would it take him to read a 225 word article.

Step-by-step explanation:

Unit rate defined as the are rates are expressed as a quantity of 1, such as 3 feet per second or 6 miles per hour, they are called unit rates.

As per the statement: Derek reads at a rate of 25 words per minute.

⇒ unit rate per minute = 25 words.

To find how long would it take him to read a 225 word article.

Let the time be t would it take him to read a 225 word article.

Total number of words = unit rate per minute t.

Substitute the given values, to solve for t,

Divide on both sides by 25 we get;

Simplify:

t= 9 minute.

Therefore, it would  take him to read a 225 word article is, 9 minute.

3,6 and 7.

step-by-step explanation:

a) unit place of 37 is 7

so the unit place of cube of 37 will be

7³= 343=3

the answer is 3.

b) unit place of 56 is 6, so the unit place of cube of 56 will be

6³= 216=6

the answer is 6.

c) unit place of 133 is 3, so the unit place of cube of 133 will be

3³= 27= 7.

the answer is 7.