Answer: 72,910
Step By Step Explaination: 7.291 x 10^4
10^4 means to move the decimal places four times.
7.921 = 79.210 = 792.10 = 7921.0 = 79,210

The Correct choice among them is ~ B

because it's a equation !
$80-$2= $78 is the number less than $80, since the pens cost $2
78/2= 39 pens is the greatest number of pens sold
hope this helps
Start with 3 one-by-one squares. This represents the '3' in 4t+3
Then draw 4 rectangles that are vertical or horizontal. Make sure the rectangle is longer than it is wide, or vice versa. The longer side is t units long (t is just a placeholder for a number). The shorter side is 1 unit long
The longer thin rectangles have an area of 1*t = t square units. Four of them represent t+t+t+t = 4*t = 4t
The small squares have an area of 1*1 = 1. Three of them represent 1+1+1 = 1*3 = 3
This is one possible way to draw it out. See the attached drawing.
We draw 10 white tiles.
Then we shade in 9 of them.
We count the remaining tiles to get the answer, which is 1.