241 Answered Questions for the topic Exponential Functions

03/24/19

#### solve for a b c and d exponential functions

suppose 𝑓(𝑥)=𝑥+4and𝑔(𝑥)=2𝑥−5 thenA.) (𝑓∘𝑔)(𝑥)=B.) (𝑓∘𝑔)^−1(𝑥)=C.) (𝑔^−1∘𝑓^−1)(𝑥)=D.) (𝑔^-1∘f^-1)(x)=

03/11/19

#### Interpreting and Using Exponential Functions

A scientist models the number of grams of a radioactive substance with the expression 15(1/2)^(d/5), where d is the number of days since the sample was measured. After how many days has half of... more

12/09/18

#### exponential functions

An exponential function, in the for f(x)=ab^x, passes through the points (2,5) and (4,180). Find b.

09/21/18

#### exponential equation identification

Find the exponential function f(x)=Ca^x whose graph goes through the points (0,2) and (3,16). a=  C=

09/19/18

#### The radioactive substance cesium-137 has a half-life of 30 years. The amount A(t) in grams of cesium-137 remaining after t years is the following function

A(t)=621(1/2)t/30   Initial grams? After 100 years?

09/15/18

#### Exponential Function?

coolsculpting is a fairly new fat-freezing procedure. One treatment dissolves about 25% of the fat cells in the treated region. a) If a patient starts wih 5 lbs of fat in the treated region, how... more

09/09/18

#### EXPONENTIAL EQUATIONS & FUNCTIONS

A culture of bacteria doubles in weight approximately every 2.5 hours. The number of bacteria after t hours later can be approximated by 𝑁(𝑡) = 175(2.5)t a) How many bacteria would there be... more

08/20/18

#### Exponential Functions

The population of a city was about 1.78 thousand in the year 2014, with an annual growth rate of about 1.3%. This situation is represented by the growth function P(t)=1.78(1.013)t , where t is the... more

08/08/18

08/07/18

#### Exponential decrease

A medicine is given with a dosage of 30mg, during the first 4 hours 17.7 mg of the drug is broken down. A body generally does this exponentially.   What is the rate of decay? When writing it as a... more

08/06/18

#### When Facebook was founded it had three initial users. At the end of each month the computers determine the number of users by 75%

When Facebook was founded it had three initial users. Now, since so many people use Facebook, they use computers to calculate the total users. At the end of each month, at midnight, the computers... more

08/03/18

#### Exponential function

K(t) = 50 · 0.65t   with t the time in hours.   For this formula calculate the growth factor per 15 minutes.   And, the forumila K(t) can be rewritten in a form t= A log(K) + B. Do this to... more

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