$990
550 x .80 = 440
$550 + $440 = $990
The product of a scalar and a matrix is found by multiplying each element of the matrix by the scalar. Multiply each element by -4.
... [4 -12 -24 12]
To find the area of the circle, you will use the formula for finding area of any circle.
The radius is half the diameter.
A = pi x r^2
3.14 x 13^2
A = 530.66 square units
The area is 530.66 square units.
50 People played an instrument. Every 10 people is represented as a 1 in the fraction. 5=50
