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jeyben [28]
3 years ago
10

THE TOPIC IS: AREA OF CIRCLES!! PLEASE HELP ME WITH THIS QUESTION!!! WHATS THE ANSWER?? I WILL GIVE YOU BRAINLIEST AND A THANKS!

!! AND PLS PUT AN EXPLANATION!! CAN U PLS DO BOTH OF THESE!! :))

Mathematics
1 answer:
Debora [2.8K]3 years ago
8 0
You just need to plug the radii into the formula for the area of a circle, which is A=pi(r)^2.

The radius for the first one is half the diameter. 22 / 2 = 11.

Now plug it into the formula:

A = pi(11)^2
A = 121(pi) square mm. (Don’t forget your units!)

Same thing applies to the second question.

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RSM QUESTION NEED HELP!!!!!! A biker traveling at his usual speed can go from his house to work in 4 hours. When the weather is
kogti [31]
<h3>Answer:   216 miles</h3>

=======================================

Work Shown:

d = distance from work to his house

x = speed when weather is good

y = speed when weather is bad

y = x-6 since he travels 6 mph slower

------------------------

On a good weather day, he travels for 4 hours and goes at x mph

distance = rate*time

d = r*t

d = x*4

d = 4x

----------------------

On a bad weather day, he travels 4.5 hours (half hour more than 4 hrs) and goes at y = x-6 mph

d = r*t

d = y*4.5

d = 4.5y

d = 4.5(x-6) .... replace y with x-6

d = 4.5x-27 .... distribute

----------------------

The values of d for both equations are the same, as the biker is traveling the same distance. So we can equate the two right hand sides (RHS) and solve for x.

4.5x-27 = 4x

4.5x-4x = 27

0.5x = 27

x = 27/0.5

x = 54

The biker's speed on a good weather day is 54 mph.

A bad weather day's speed would be y = x-6 = 54 - 6 = 48 mph.

----------------------

Now compute the value of d

d = 4x

d = 4*54

d = 216

The biker travels 216 miles on a good weather day

or,

d = 4.5*y

d = 4.5*48

d = 216

the biker travels that same distance on a bad weather day.

3 0
4 years ago
Please solve this problem ​
asambeis [7]

Answer:

(4) 0

Step-by-step explanation:

<u>Given:</u>

  • cos²27°×cos²34°×...×cos²167 = ?

<u>Looking at the angles measures, they form series of: </u>

  • 27, 34, 41, ..., 167

This is AP with the first term of 27 and common difference of 7

<u>We can see one of the terms of this AP is 90</u>

  • 27+9*7 = 27 + 63 = 90

Since cos 90° = 0 ⇒ cos²90° = 0 and therefore given series equals to zero as one of the terms of multiplication is zero.

<u>So correct answer choice is</u>  Option 4) 0

8 0
3 years ago
A composite figure is formed by combining a square and a triangle. Its total area is 52.5 ft. The area of the
otez555 [7]

The length of each side of the square is 3 ft.

<u>Step-by-step explanation:</u>

We have , A composite figure is formed by combining a square and a triangle. Its total area is 52.5 ft. The area of the  triangle is 43.5 ft . We know that area of a square = length^{2} . According to question:

area of square = length^{2}

area of triangle = 43.5 ft

total area = 52.5 ft.

Total area = area(square+triangle)

⇒ 43.5 + (Length)^{2} = 52.5

⇒ (Length)^{2} = 52.5- 43.5

⇒ (Length)^{2} = 9

⇒ (Length) = \sqrt{9}

⇒ Length= 3

Therefore, the length of each side of the square is 3 ft.

3 0
3 years ago
Mr. townsend bought five hot dogs for his family from the concession stand. each hot dog cost $1.75. how much change will he get
svetoff [14.1K]
The five hotdogs cost 1.75 ×5 = 8.75$
then 10-8.75=1.25$
he will get back with 1.25$
8 0
3 years ago
Read 2 more answers
A rectangle is 8 feet long. Its area is 64 square feet.what is the perimeter
Alex17521 [72]
Area = length * width

64 = 8 * width

width = 8

Perimeter = 2(Length + Width)

Perimeter = 2(8 + 8)

Perimeter = 2(16)

Perimeter = 32 feet

The perimeter is 32 feet.
8 0
4 years ago
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