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Alexeev081 [22]
3 years ago
13

What is the perimeter of a square with a side length of 15 inches?

Mathematics
1 answer:
nexus9112 [7]3 years ago
8 0
60 in^2 will be your answer.
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What is the volume of a cube with an edge length of 7 centimeters?
crimeas [40]
Volume of a cube is a side length cubed

So 7*7*7

Answer is 343 centimeters
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3 years ago
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Find the distance between the set of points (3, -3) and (3, 7)
Jobisdone [24]

Answer: 10

Step-by-step explanation:

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2 years ago
In a volleyball game, a player on one team spikes the ball over the net when the ball is 10 feet above the court. The spike driv
Fynjy0 [20]

Answer:

4.75 seconds

Step-by-step explanation:

Initial height of the ball from the ground = 10 feet

Upward initial velocity given = 55 feet per second

Value of g ( acceleration due to gravity) = 32.2 feet per s²

Motion of the ball:

The ball first goes vertically upwards, gravity decelerates the body and it momentarily comes to rest at a point in its upward trajectory, which is the point of maximum height. From this point, to the ground, the ball behaves as a freely dropped body.

Till the ball reaches its maximum height:

u = + 55

v = 0 ( final velocity is zero)

a = - 32.2 (since it is deceleration)

we know that <em>v = u + at </em>

⇒    0 = 55 - 32.2t

⇒  t = 1.7 s

Also , we have <em>s = ut + (1/2)at²</em>

Here, s is the maximum height from the point where ball is thrown

So,     s = 55(1.7) - (0.5)(32.2)(1.7)(1.7)

⇒ s = 140 feet

So at a height of 140 feet + 10 feet (initial height) = 150 feet, the ball acts as a freely dropped body.

Here,      u = 0

               a = +32.2

               s= 150

<em>s = ut + (1/2)at²</em>

⇒  150 = 0.5 ( 32.2) (t²)

⇒  t² = 300/32.2 = 9.31

⇒ t = 3.05 sec

So total time = 1.7 + 3.05 = 4.75 seconds

8 0
3 years ago
A school teacher wants to survey students at her elementary school. She surveys 20 students from each grade level. What type of
Elan Coil [88]

Answer:

Stratified Random sampling

Step-by-step explanation:

When a random observations are selected from a number of individual groups in a particular population, the type of sampling technique is called Stratified Random sampling. Stratified Random sampling begins with the partitioning or splitting or a population into subgroups. A number of random selection are then made from each of the subgroups to form a collection of larger samples. This is different from the simple random sampling technique which makes random selection directly from a larger sample or population without prior partitioning of the population. The different grades of students represents the individual stratum from which random selections are made.

4 0
3 years ago
Please could someone help with this one . Thanks I will brainlist
inessss [21]
The answer to this is the third option choice: Reaches a maximum height of 549 after 5.75 seconds.
5 0
3 years ago
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