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
erastova [34]
3 years ago
6

Sharon kicks a ball from the ground into the air with an upward velocity of 64 feet per second. The function h = -16t2 + 64t mod

els the height h, in feet, of the ball at time t, in seconds. When will the ball reach the ground again? 1 second after the ball is thrown 2 seconds after the ball is thrown 3 seconds after the ball is thrown 4 seconds after the ball is thrown
Mathematics
2 answers:
Goryan [66]3 years ago
8 0
4 seconds ................
pychu [463]3 years ago
5 0
To find when the ball reaches the ground, you would need to find the time that gives you a height value of zero. 

Your answer would be 4 seconds

h = -16(4)^2 + 64(16)
h = -16(16) + 256
h = -256 + 256
h = 0

Hope this helps!
You might be interested in
Least difference of produce of 48
NNADVOKAT [17]

Answer:

thats a hard one..

Step-by-step explanation:

7 0
2 years ago
Cindy earns $10.50 per hour working at a restaurant. On Friday, she spent 1 3/4 hours cleaning, 2 1/3 hours doing paperwork, and
AnnyKZ [126]
$61.25

All you have to do is add all the fractions and multiply it by 10.50
7 0
3 years ago
A salesperson contacts eight potential customers per day. From past experience, we know that the probability of a potential cust
AlexFokin [52]

Answer:

(a) The probability the salesperson will make exactly two sales in a day is 0.1488.

(b) The probability the salesperson will make at least two sales in a day is 0.1869.

(c) The percentage of days the salesperson does not makes a sale is 43.05%.

(d) The expected number of sales per day is 0.80.

Step-by-step explanation:

Let <em>X</em> = number of sales made by the salesperson.

The probability that a potential customer makes a purchase is 0.10.

The salesperson contacts <em>n</em> = 8 potential customers per day.

The random variable <em>X</em> follows a Binomial distribution with parameters <em>n</em> and <em>p</em>.

The probability mass function of <em>X</em> is:

P(X=x)={8\choose x}0.10^{x}(1-0.10)^{8-x};\ x=0,1,2,3...

(a)

Compute the probability the salesperson will make exactly two sales in a day as follows:

P(X=2)={8\choose 2}0.10^{2}(1-0.10)^{8-2}\\=28\times 0.01\times 0.5314\\=0.1488

Thus, the probability the salesperson will make exactly two sales in a day is 0.1488.

(b)

Compute the probability the salesperson will make at least two sales in a day as follows:

P (X ≥ 2) = 1 - P (X < 2)

              = 1 - P (X = 0) - P (X = 1)

              =1-{8\choose 0}0.10^{0}(1-0.10)^{8-0}-{8\choose 1}0.10^{1}(1-0.10)^{8-1}\\=1-0.4305-0.3826\\=0.1869

Thus, the probability the salesperson will make at least two sales in a day is 0.1869.

(c)

Compute the probability that a salesperson does not makes a sale is:

P(X=0)={8\choose 0}0.10^{0}(1-0.10)^{8-0}\\=8\times 1\times 0.4305\\=0.4305

The percentage of days the salesperson does not makes a sale is,

0.4305 × 100 = 43.05%

Thus, the percentage of days the salesperson does not makes a sale is 43.05%.

(d)

Compute the expected number of sales per day as follows:

E(X)=np=8\times 0.10=0.80

Thus, the expected number of sales per day is 0.80.

7 0
2 years ago
Two mechanics worked on a car. the first mechanic worked for 10 hours, and the second mechanic worked for 15 hours. together the
Yuliya22 [10]
Let x and y be the rate per hour for Mechanic 1 and 2 respectively.

Then,
x+y=205 ---------- (1)
Additionally,
10x+15y = 2500 ------ (2)

Solving equations 1 and 2;
Multiply (1) by 10 and subtract two from the result,
10x+10y = 2050
10x +15 y =2500
----------------------
        -5 y = --450 => y = 450/5 = $90
Then,
x= 205-90 = $115

Therefore,
Mechanic 1 charged $115 per hour
Mechanic 2 charged $90 per hour
3 0
3 years ago
Subtract. (4/5p+1/2)-(1/4p-3) <br><br> A: 21/20p-5/2 <br><br> B: 1/5p-7/2 <br><br> C: 11/20p+7/2
Leto [7]

Answer:

A

Step-by-step explanation:

I think it's A because it mostly multiplies then adds and subtracts so you get your answer doing this

8 0
2 years ago
Other questions:
  • Let f(x) = x2 and g(x) = x − 3.
    12·1 answer
  • Someone who is smart in math help me!!
    7·1 answer
  • Gift bags are being distributed at a birthday party. If there was a total of 140 jolly ranchers
    7·1 answer
  • Someone please help me. why is this problem what it is i already know the answer its c but im confused as to why it is c please
    10·1 answer
  • Explain how u can mentally find the sum of the fractions in exercise 3 without actually performing the calculations.
    6·2 answers
  • Solve |2x - 6|&lt;10<br> {x|-2&lt; x&lt; 8}<br> {x|-8&lt; x&lt; 8}<br> {x|2&lt; x&lt; 8}
    7·1 answer
  • What is the surface area of the right cylinder with a height of 20 and a radius of 5
    15·2 answers
  • Evaluate M/N for M=10, N=-5, and P =-2
    13·1 answer
  • At Silver Gym, membership is $35 per month, and personal training sessions are $25 each. At Fit Factor, membership is $55 per mo
    15·1 answer
  • 1/4 is to 1/5 as 20 is to what, please help
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!