Evaluate the expression. If necessary, round to the nearest hundredth.
7^log7 23
A. 7
B. 23
C. log7 23

B. 23.

Step-by-step explanation:

In the expression

the logarithm in the exponent is asking us the following question:

"to what power should I raise 7 to as to get 23?"

Let us call that number , then we have

, which means

or

which is Choice B.

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.