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
den301095 [7]
3 years ago
9

An rock is thrown upward from a platform that is 188 feet above ground at 80 feet per second. Use the projectile formula to dete

rmine when the rock hit the ground.
Mathematics
1 answer:
serious [3.7K]3 years ago
8 0

Answer:

6.74 s

Step-by-step explanation:

y = ½ at² + vt + h

Given a = -32, v = 80, h = 188:

y = ½ (-32) t² + (80) t + (188)

y = -16t² + 80t + 188

When y = 0:

0 = -16t² + 80t + 188

0 = 4t² − 20t − 47

Solve with quadratic formula:

t = [ -(-20) ± √((-20)² − 4(4)(-47)) ] / 2(4)

t = [ 20 ± √(400 + 752) ] / 8

t = (20 ± √1152) / 8

t > 0, so:

t = (20 + √1152) / 8

t ≈ 6.74

You might be interested in
What type of correlation does the data set display?
lara31 [8.8K]

Answer:

B-NO CORRELATION.....

4 0
3 years ago
Find the percentage of change when 77 is decreased to 70. If necessary, round your answer to the nearest tenth
Svet_ta [14]
Change % = (77-70)/77 *100

= 100/11 = 9.1 % decrease

option C)

hope it helped
8 0
3 years ago
Pleaseeeeeee helpppppppp​
mixer [17]

Answer:

B) Multiplying by 0

Step-by-step explanation:

This answer is correct because lets say we have a nonzero number, (IN this case lets say 4) 4+0 is 4, and that does not change the value because it is still 4, so A is not correct. Multiplying by 1 and dividing by one leads to the same conclusion. They both wind up to 4. The only one is B) because 4x0 is 0 and that isn't 4, so it changes value.

Hope this helped :)

5 0
3 years ago
John has $2 in his bank account when he gets a job. He begins making $107 a day. A student found that the equation that represen
ZanzabumX [31]
That equation means that John started with $107 in his bank account and is making $2 dollars a day. The correct equation is y=107x+2.
7 0
4 years ago
What is the diameter of this circle?​
ozzi

Answer:

diameter=18 in

radius=9 in

area=254.47 in

circumference=56.55 in

Step-by-step explanation:

<u>Key</u>

C=Circumference

D=Diameter

R=Radius

A=Area

π=pi=3.14159265359

<u>Formulas</u>

2r=d

d/2=r

πr^2=a

(2πr)=c

Brainliest Plz

3 0
3 years ago
Other questions:
  • Describe the motion of a particle with position (x, y) as t varies in the given interval. x = 3 + 2 cos(t), y = 3 + 2 sin(t), π/
    13·1 answer
  • How is the number 2 in 582 similar to the 2 in the number 528
    12·2 answers
  • How many tickets must be sold on Saturday to make the median and the mode the same?
    15·2 answers
  • The table shows the relationship y=kk. It’s a constant of proportionality, k?
    5·2 answers
  • The book store is having a sale where all hardcover books are 20% off. Jamie also has a coupon for 15% off any fiction book. Jam
    10·2 answers
  • Freeeeeeeeeee points I hope your get some
    8·2 answers
  • A farmer raises only ducks and pigs. There are 55 animals in all on his farm, and 146 legs.
    9·1 answer
  • at the animal shelter there are 15 dogs 12 cats three snakes and 5 parakeets which animal makes up approximately 14% of the anim
    10·2 answers
  • Sanam eats 5 almonds daily. How many almonds does she eat in 157 days?​
    5·1 answer
  • M=p-2b/2 <br> p=57.4<br> b=8.7
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!