Solve the problem.The area of a circle is found by the equation A = ?r2. If the area A of a certain circle is 36? square centimeters, find its radius r.
A. {6 cm, -6 cm}
B. 6? cm
C. 6
cm
D. 6 cm
Answer: D
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Find 
.y = 5ex
A. 5ex (ex) B. 5ex ln 5 (ex) C. 5ex ln 5 D. (ex)5ex - 1
Solve the problem.Assume that the volume of Earth is5 × 1014 cubic meters and the volume of a bacterium is2.5 × 10-16 cubic meters. If Earth could be filled with bacteria, how many would it contain?
A. 5.0 × 1031 bacteria B. 2.0 × 10-30 bacteria C. 2.0 × 1030 bacteria D. 5.0 × 10-31 bacteria
Use the check register find the ending balance.The Flower Shoppe had a balance of src="https://sciemce.com/media/4/ppg__10624191611__f1q27g6.jpg" alt="" style="vertical-align: -4.0px;" /> she wrote two payroll checks: 
in its business checking account on 
The manager made a deposit on the same day for 
and wrote check 
to Illinois Power for 
Then on 
to Margaret Flores for 
and 
to Henry Baker for 
On 
she made a 
cash deposit. Record the checks and deposits in The Flower Shoppe's check register, and then find the ending balance.
A. $1520.35
B. $749.55
C. $2462.45
D. $3461.93
Solve the quadratic equation:
a. -3, 7 b. 3, 7 c. -3, -7 d. 3, -7