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Gre4nikov [31]
1 year ago
7

The height of a projectile launched upward at a speed of 25 meters/second from a height of 70 meters is given by the function h(

t)=-5sup(t,2)+25t+70. How long will it take the projectile to hit the ground?
Mathematics
1 answer:
N76 [4]1 year ago
5 0

6.5 s  take the projectile to hit the ground.

<h3>What is projectile?</h3>

A projectile is any object thrown into space upon which the only acting force is gravity.

Given:

speed = 25 m/s

h(t) = -5t² + 25t  + 70

height = 70 m

Time to reach maximum height

( u sin90)/2g

= 25/2*9.8

= 1.275s

Max height = u²Sin²\theta/g

=25*25/9.8

=63.775

So, total height=63.775 + 70 = 133.775 m

Now, time to fall back to the ground

h = ut+(1/2)gt²

t² = (h- ut)2/g

u=0

H= 133.775 m

(133.775*2)/9.8= t²

t² = 27.3010

t= 5.225 s

Total time taken to hit ground

= 5.225 + 1.275

= 6.5 s

Learn more about this concept here:

brainly.com/question/17096336

#SPJ1

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Eight less than a number divided by seven equals 2
madreJ [45]

Answer:

x=12

Step-by-step explanation:

(X-8)/7=2

X-8=14

X=22

7 0
3 years ago
Angle A and B are supplementary. Angle a has a measure of 80. What is the measure of angle B? The measure of angle B is
ololo11 [35]
Well when two angles are supplementary they equal 180.
So if angle A is 80 degrees then that would mean that angle B equals 100 degrees. 


Hope This Helped :) 



4 0
3 years ago
Which is not an improper fraction equal to eight
Oliga [24]
The fraction that is improper and it equals 8 is 64/8
7 0
3 years ago
Read 2 more answers
52 plus what equals 180
Pavlova-9 [17]

Answer:

128

Step-by-step explanation:

180-52= 128

7 0
3 years ago
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Priya's rectangular prism measures inches by inches by 2 inch.
dedylja [7]

The number of cubes with edge length ⅕ inch that will fit in the prism is: 1,920 cubes

<h3>Volume of a Rectangular Prism</h3>

Volume of a rectangular prism = length × width × height

<h3>Volume of a Cube</h3>

A cube has equal edge length. Therefore, the volume of a cube = a³, where a is the edge length.

Given the following,

Dimensions of Priya's Rectangular Prism:

2⅖ = 2.4 inches

3⅕ = 3.2 inches

2 inches

Volume of the Rectangular Prism = 2.4 × 3.2 × 2 = 15.36 in.³

Dimension of the cubes:

edge length = ⅕ inch

Volume of the cube = (⅕)³ = 0.008 in.³

The number of ⅕ inch edge cube that will fit in the prism = Volume of Prism / Volume of Cube

= 15.36/0.008 = <em>1,920 cubes </em>

Learn more about Volume of Prism on:

brainly.com/question/9761614

5 0
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