How many square inches are in 60 square feet? a.5 square inches b.72 square inches c.720 square inches d.8,640 square inches

C.720

Step-by-step explanation:

So first there are 12 inches in a foot so if there are 60 feet and you are converting them to inches you would do:

60*12

=720 in.

The answer is D 8,640

Step-by-step explanation:

The number of inches that are in square feet is 144 per square foot. So now do 60 times 144 and you get 8,640

3. parallelogram

step-by-step explanation:

we turn each of our sides into direction vectors

ab=b-a=(3 - 7, 1 - 0) = (-4, 1)

bc=c-b=(1,6)

cd=d-c=(4,-1)

da=a-d=(-1,-6)

we see how the opposite sides have negated direction vectors; this is characteristic of a parallelogram.   we have congruent sides ab=cd and bc=da with unequal lengths because 1^2+6^2 is different from (-4)^2+1^2.   so it's not a square or a rhombus.  

we check the dot product of direction vectors of adjacent sides.   we have

ab dot bc = -4(1) + 1(6) = 2

that's not zero so the sides are not perpendicular.   we've ruled out rectangle.

the direction vectors indicate two pairs of congruent parallel sides, so we choose parallelogram over trapezoid.