PS Form25 sec2-Q14

[liyun]

請教一下

Mary invested $8400 for 6 months in a certificate of deposit paying 9 1/4 percent simple annual interset. How much more interest would Mary have received if the interest rate on this certificate had been 9 3/4 percent simple annual interesst?

A $2.10
B $21.00
C $42.00
D $210.00
E $420.00

謝謝唷!!

[chour]

答案是B $21.00嗎?
8400*(9.75%-9.25%)*6/12=21

[eiswein]

答案是B $21.00嗎?
8400*(9.75%-9.25%)*6/12=21

同意chour~