A running track in the shape of an oval is shown. The ends of the track form semicircles. What is the perimeter of the inside of the track? (π = 3.14) (1 point)

The perimeter of the inside of the track is 435.84 m

Step-by-step explanation:

Here, we note that from the diagram,

The (inside) length of the straight sides of the oval are each = 130 m

The (inside) diameter of the semicircles at ends of the oval = 56 m

Therefore, since there are two semicircles of equal diameter, the length on the inside of the semicircles = Circumference of a circle of similar diameter

length on the inside of both semicircles = π×D

Where:

D = Diameter of the semicircle

length on the inside of both semicircles = π×56 = 3.14×56 = 175.84 m

Also, the length of the two straight sides = 2 × 130 = 260 m

Total length of the inside of the track = 260 + 175.8  = ‭435.84‬ m

Therefore, the perimeter of the inside of the track = 435.84 m.

it is x=-4

step-by-step explanation:

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

click to let others know, how is it

0.0

0 votes

1

report

read more on -

step-by-step explanation: