1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
hoa [83]
3 years ago
7

A water rocket is projected vertically upward from the ground. Its a height(h) m above the ground after t seconds is given by h=

20-5(t-2)^2. When will the rocket reach the ground?
MARKING THE BRAINLIEST
Mathematics
1 answer:
Morgarella [4.7K]3 years ago
5 0

The rocket will reach the ground after 4 seconds

Step-by-step explanation:

  • Step 1: Find the time when the water rocket reaches the ground.

When the water rocket reaches the ground, the height, h will be zero.

⇒ h = 20 - 5(t - 2)²

⇒ 0 = 20 - 5(t - 2)²

⇒ 5 (t - 2)² = 20

⇒ (t - 2)² = 4

⇒ t - 2 = √4 = 2

∴ t = 2 + 2 = 4 seconds

You might be interested in
This is a math question find the complement of 50 degree​
AlexFokin [52]

Given:

The measure of an angle is 50 degrees.

To find:

The complement of the given angle.

Solution:

We know that the sum of an angle and its complement is 90 degrees.

Let x be the complement angle of 50 degrees.

x+50^\circ=90^\circ

x=90^\circ-50^\circ

x=40^\circ

Therefore, the measure of complement of the given angle is 40 degrees.

6 0
3 years ago
Find the surface area of a square pyramid with a base length of 24 cm and a height of 16 cm. Explain how you solved the problem.
icang [17]

Answer:

the answer b

Step-by-step explanation:

[surface area]=[area of 4 triangles sides]+[area of square base]

[area of square base]=24*24--------> 576 cm²

[area of one triangles side]

l=slant height

l²=16²+12²-------> l²=400-----------> l=20 cm

[area of one triangles side]=24*20/2--------> 240 cm²

[area of 4 triangles sides]=4*240----------> 960 cm²

[surface area]=[960]+[576]--------> 1536 cm²

6 0
3 years ago
23% of 75 is what number?
stich3 [128]
Percent means parts out of 100
23%=23/100=0.23

'of' means mutiply
23% of 75=0.23 times 75=17.25

answer is 17.25
3 0
3 years ago
At a local high school, 30% of the students are on a school sports team, 25% take at least one Advanced Placement (AP) class, an
gogolik [260]

Answer:

not sure but 30 over 100 for the sports and 10 over 100 for at least one ap class

Step-by-step explanation:

can u please comment I need to talk to you

hurry

8 0
3 years ago
1) Where is the midpoint of , when A (6, 7) and B (-9, -5)?
lord [1]

Answer:

(−1.5,1)

Step-by-step explanation:

Finding the distance, midpoint, slope, equation and the x y-intercepts of a line passing between the two points p1 (6,7) and p2 (-9,-5)

The distance (d) between two points (x1,y1) and (x2,y2) is given by the formula

d = √  ((X2-X1)2+(Y2-Y1)2)

d = √ (-9-6)2+(-5-7)2

d = √ ((-15)2+(-12)2)

d = √ (225+144)

d = √ 369

The distance between the points is 19.2093727122985

The midpoint of two points is given by the formula

Midpoint= ((X1+X2)/2,(Y1+Y2)/2)

Find the x value of the midpoint

Xm=(X1+X2)/2

Xm=(6+-9)/2=-1.5

Find the Y value of the midpoint

Ym=(Y1+Y2)/2

Ym=(7+-5)/2=1

The midpoint is: (-1.5,1)

6 0
3 years ago
Read 2 more answers
Other questions:
  • A corporation is considering a new issue of convertible bonds, mandagemnt belives that the offer terns will be founf attractiv b
    15·2 answers
  • The radius of a circle is 1m. find the circumference to the nearest tenth <br> quick answers please
    8·1 answer
  • Can you help me with this question.
    9·2 answers
  • The area of the square is 25 cm2. What is the formula that shows the length of side b?
    14·1 answer
  • A cylindrical basin is 2 feet tall and has a diameter of 5 feet, as shown. If the basin is completely filled with water, how muc
    5·2 answers
  • I give Brainliest please help! the last answer got cut off so the last one it's Quadrant IV​
    10·2 answers
  • You finish 3/10 of the project. Your friend finishes 2/3 of the project. What fraction of the project is finished??
    11·2 answers
  • I am kind of confused on this it has been a very long time since I’ve done this unit.
    7·2 answers
  • I need to simplify the complex fraction.​
    15·1 answer
  • Who every gets it right will get Brainly and 20points
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!