MATHEMATICS MIDDLE SCHOOL

Which expression gives the surface area of a sphere with radius r​

Answers

Answer 1
Answer:

Answer:

Simple, 4*pi*r^2

Step-by-step explanation:
Answer 2
Answer:

The correct answer is 4πr^2

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angle y and angle x form vertical angles. Angle y forms a straight line with the 80 degree angle and the 60 degree angle. Write and solve an equation to determine the measure of angle x

Answers

If angle y and angle x form vertical angles, then they ARE vertical angles.  Vertical angles have the SAME degree measure.  If angle y forms a straight line with the 80 degree angle and the 60 degree angle, this means that adding angle y, the 80 degree angle, and the 60 degree angle gives you a straight line.  A line is 180 degrees.  So, angle y's measure=180-(80+60).  Since measure of angle x equals measure of angle y, the equation is m<x=180-(80+60).

Let's solve.  m<x=180-(80+60).  m<x=180-140.  m<x=40 degrees.

Answer: m<x=180-(80+60); m<x=40 (degrees)

angie has 12 feet if string.She will cut the string into equal lengths of 5 inches each.How much string will be left after she cuts as many of these lengths as possible?

Answers

12 ÷ 5 = 2.4. So there will be 0.4 string left.

Round each time to the nearest whole second. Then estimate how many seconds bailey won the race by.

Answers

The whole second is the first number to the left of the decimal (_.), so : 35.78=36 because 7>5. 39.51=40 because 5=5. 40-36=4. Bailey won the race by about 4 seconds. Hoped I helped!
Bailey won by 4 seconds because if you round her score it would be 36 and Elenas score is 40.

How could the fact 36/6=6 help you estimate the quotient of 364,573/64?

Answers

Because when you round 364,573 to the nearest thousand , you get 360,000 and when you round 64 , you get 60 and if you take away the zeros, the equation is basically 36÷6

TIME REMAINING01:53:13
Rangsey is doing a science experiment on evaporation. He fills a container of water and measures the height of the water in
the container as 24.5 centimeters. After 15 days, the height of the water is 0.8 of its original height. What is the height of the
water in the container after 15 days?
0.76 centimeter
1.96 centimeters
7.6 centimeters
19.6 centimeters

Answers

Answer:

19.6

Step-by-step explanation:

24.5 x. 8

Answer:

it is d

Step-by-step explanation:

edge 2021

A 22-foot ladder is resting against the side of a building. The bottom of the ladder is 3 feet from the building. Find the measure of the angle the ladder makes with the ground. Round your answer to the nearest tenth of a degree.

Answers

The measure of the angle the ladder makes with the ground is 82.2°

What is a right angled triangle?

A triangle in which one angle is 90° is called a right angled triangle.

  • The side opposite to the right angle is the hypotenuse.

How to find the measure of the angle the ladder makes with the ground ?

According to the problem,

  • Length of the ladder is 22 feet.
  • The bottom of the ladder is 3 feet from the building.
  • A right angled triangle is formed here, in which the ladder is the hypotenuse and the base is the distance between the bottom of the ladder and the building

We know that in a right angled triangle,  

cosФ = (base)/(hypotenuse) , where Ф is the angle between base and hypotenuse.

Here, cosФ = (3)/(22)

⇒ Ф = 82.2°

∴ The measure of the angle the ladder makes with the ground is 82.2°

Find out more information about the measure of angles of right angled triangle here: brainly.com/question/8074395

#SPJ2
Hello,

We know the hypotenuse 22 ft,
the adjacent side 3 ft,
so the cosine of the angle we are going to search is 3/22
that's done cos α=3/22==>α=82.1625...°≈82.2°
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