1 5.4.3 Test (CST): Exponents and Exponential Functions Question 15 of 25
Find f(-4) for f(x) = 9(3)*

f(-4) = ⅑

Step-by-step explanation:

Given

f(x) = 9(3)^x

Required.

Find f(-4)

f(x) = 9(3)^x

Substitute -4 for x

f(-4) = 9(3)^(-4)

Apply laws of indices

f(-4) = 9 * 1/(3⁴)

f(-4) = 9 * (⅓)⁴

f(-4) = 9 * 1/81

f(-4) = 9/81

Simplify

f(-4) = ⅑

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.

here is a big fat