What is the area of the grey matting in this 16” by 20” picture frame if the picture to be framed is 8” x 10”?

picture frame.

select one:
a. 320 sq. in.
b. 80 sq. in. incorrect
c. 240 sq. in.
d. 480 sq. in.

c. 240 sq. in.

Step-by-step explanation:

area = length x width

find the area of 16 x 20 and 8x10,  then subtract the 8x10 area from the 16 x 20.

16 x 20 = 320

8 x 10 = 80

320 - 80 = 240

the answer would be 1 1/72

step-by-step explanation:

you can rewrite the equation by separating the parts and then solving individually:

10-9=1

1/8 - 1/9=

find l c d and then combine:

1 1/72

0.02

step-by-step explanation:

time of 9 192 631 770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium 133 atom at 0 k (but other seconds are sometimes used in astronomy)