4 ft
diameter =

Circumference
=
Area =

diameter (d)= 2r=2*4=8ft

Step-by-step explanation:

circumference =2πr

=2 *4*22/7

=25.14 ft

also

Area=πr^2

=4^2 *22/7

50 .28 sq ft

Diameter: 8ft

circumference: 25.12

area: 50.24 square feet

Step-by-step explanation:

radius is 4ft

Diameter is 8ft

circumference 2×pi×radius

2×3.14×4

25.12

area (pi)radius^2

3.14×(4)^2

3.14×(16)

50.24

50 square feet

3.4 pizzas

step-by-step explanation:

given is a scatter plot showing number of pizzas sold during weeks for different issues of coupon

y represents number of pizzas sold and x number of coupons issued

y is marked verticaly and x horizontally

the trend line is given as

y =3.4x+43

this says that even when no coupon is issued pizzas sold will be 43

and rate of change of pizza sold for 1 unit of coupon = slope = 3.4

i.e. when x increases by 1 unit y increases by 3.4 units

hence for each additional coupon issued 3.4 pizzas more will be sold

answer: the equation matches the regression

step-by-step explanation: