2.

(07.04)

Solve 3^(2x)= 7^(x1). (2 points)

7.74293

7.74293

1

1

3.

(07.04)

Ciara solved the exponential equation 3^x+1= 15 and her work is shown below. What is the first step she did incorrectly? (3 points)

Step 1:log 3^x+1= log15

Step 2:(x + 1)log 3 = log15

Step 3:log3 =

Step 4:0.477121 =

Step 5:0.477121(x + 1) = 1.176091

Step 6:x + 1 =

Step 7:x + 1 = 2.464975

Step 8:x = 1.464975

Step 1

Step 2

Step 3

Step 4

4.

(07.04)

You decide to put $150 in a savings account to save for a $3,000 down payment on a new car. If the account has an interest rate of 2.5% per year and is compounded monthly, how long does it take you to earn $3,000 without depositing any additional funds? (3 points)

10.1101 years

119.954 years

121.321 years

134.34 years