Tina and her family live on a farm. Each summer they design and plant a corn maze for local children to enjoy in the autumn. This year Tina is designing the maze. Here are the details of her proposed design.
· The corn is to be planted in four concentric circles as shown in the diagram.
· The radii of the circles of corn are as marked in the diagram.
· A 3-Foot arc of each circle of corn will not be planted, as shown in the picture.
Tina’s parents want to make a gravel walkway that will extend 6 feet from the outer circle of the maze all the way around the maze. Find the area of the walkway. Round your answer to the nearest square foot, if necessary.

The answer is in the image 

The total nom of  code that can be used is equal to 5+3 = 8

For every 8 cars there are 7 trucks

Therefore,

Cars:Truck=8:7

Answer is B)8:7

Here,

tip=18%of $32

tip=(18/100)*32

=0.18*32

=$5.76

Total payment=32+5.76=$37.76

The wood before starting =12 feet

Left wood=6 feet

Wood used till now=12-6=6 feet

Picture frame built till now= 6/(3/4)

=8 pieces

Therefore, till now 8 pieces have been made.

The wood before starting =12 feet

Left wood=6 feet

Wood used till now=12-6=6 feet

Picture frame built till now= 6/(3/4)

=8 pieces

Therefore, till now 8 pieces have been made.

The wood before starting =12 feet

Left wood=6 feet

Wood used till now=12-6=6 feet

Picture frame built till now= 6/(3/4)

=8 pieces

Therefore, till now 8 pieces have been made.

The answer is in the image 

30% of 420 are first year students

first year students = (30/100 )*420

=126 students

Student who are not in first year = 420-126

=294 students