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
Dmitrij [34]
2 years ago
5

121. How much sand is needed to fill a sandbox

Mathematics
2 answers:
Kamila [148]2 years ago
4 0
The answer is D. 72 cu ft.
Katyanochek1 [597]2 years ago
3 0

Answer: The answer is D. 72 cu ft.

Step-by-step explanation:

You might be interested in
I NEED HELP ASAP I DONT UNDERSTAND THIS!!
zheka24 [161]

Let the cost of the hair dryer equal x.

The net cost plus a 40% markup equals 42, set up an equation and solve forex.

1.4x = 42

Divide both sides by 1.4

X = 42 / 1.4

X = 30

The net cost was £30

3 0
3 years ago
What is the equation of the axis of symmetry
stich3 [128]

Answer:

x=3

Step-by-step explanation:

5 0
3 years ago
14 b + 9 b – 4 – 12b Help meh pls Xd
trasher [3.6K]

Answer:

Simplify the expression.

11 b − 4

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
A university found that of its students withdraw without completing the introductory statistics course. Assume that students reg
polet [3.4K]

Answer:

A university found that 30% of its students withdraw without completing the introductory statistics course. Assume that 20 students registered for the course.

a. Compute the probability that 2 or fewer will withdraw (to 4 decimals).

= 0.0355

b. Compute the probability that exactly 4 will withdraw (to 4 decimals).

= 0.1304

c. Compute the probability that more than 3 will withdraw (to 4 decimals).

= 0.8929

d. Compute the expected number of withdrawals.

= 6

Step-by-step explanation:

This is a binomial problem and the formula for binomial is:

P(X = x) = nCx p^{x} q^{n - x}

a) Compute the probability that 2 or fewer will withdraw

First we need to determine, given 2 students from the 20. Which is the probability of those 2 to withdraw and all others to complete the course. This is given by:

P(X = x) = nCx p^{x} q^{n - x}\\P(X = 2) = 20C2(0.3)^2(0.7)^{18}\\P(X = 2) =190 * 0.09 * 0.001628413597\\P(X = 2) = 0.027845872524

P(X = x) = nCx p^{x} q^{n - x}\\P(X = 1) = 20C1(0.3)^1(0.7)^{19}\\P(X = 1) =20 * 0.3 * 0.001139889518\\P(X = 1) = 0.006839337111

P(X = x) = nCx p^{x} q^{n - x}\\P(X = 0) = 20C0(0.3)^0(0.7)^{20}\\P(X = 0) =1 * 1 * 0.000797922662\\P(X = 0) = 0.000797922662

Finally, the probability that 2 or fewer students will withdraw is

P(X = 2) + P(X = 1) + P(X = 0) \\= 0.027845872524 + 0.006839337111 + 0.000797922662\\= 0.035483132297\\= 0.0355

b) Compute the probability that exactly 4 will withdraw.

P(X = x) = nCx p^{x} q^{n - x}\\P(X = 4) = 20C4(0.3)^4(0.7)^{16}\\P(X = 4) = 4845 * 0.0081 * 0.003323293056\\P(X = 4) = 0.130420974373\\P(X = 4) = 0.1304

c) Compute the probability that more than 3 will withdraw

First we will compute the probability that exactly 3 students withdraw, which is given by

P(X = x) = nCx p^{x} q^{n - x}\\P(X = 3) = 20C3(0.3)^3(0.7)^{17}\\P(X = 3) = 1140 * 0.027 * 0.002326305139\\P(X = 3) = 0.071603672205\\P(X = 3) = 0.0716

Then, using a) we have that the probability that 3 or fewer students withdraw is 0.0355+0.0716=0.1071. Therefore the probability that more than 3 will withdraw is 1 - 0.1071=0.8929

d) Compute the expected number of withdrawals.

E(X) = 3/10 * 20 = 6

Expected number of withdrawals is the 30% of 20 which is 6.

5 0
3 years ago
What is the least common denominator of 4/5 and 1/10
antiseptic1488 [7]
The least common denominator for the question you have supplied me with is 10. The least common multiple of the denominators, 5 and 10, is 10, making the LCD 10.
4 0
3 years ago
Read 2 more answers
Other questions:
  • A pole that is 3.2m tall casts a shadow that is 1.74 m long. At the same time, a nearby tower casts a shadow that is 48.25 m lon
    9·1 answer
  • Use the graph of f(x)to find the solutions to the equation f(x)=0.
    12·1 answer
  • Sin(x+22)°=cos(2x−7)°
    12·2 answers
  • A book shows an enlarged photo of a carpenter bee. A carpenter bee is about 6×10^-3 m long. The photo is 13.5 cm long. About how
    12·1 answer
  • Y=x, y=0, y=4, x=6 : find the volume of the solid generated revolving around line x=6
    13·1 answer
  • You already know. HALP!
    13·2 answers
  • 6. When an asset increases in value, it is said to
    13·2 answers
  • What is net cash flow
    9·1 answer
  • Please help-help-help
    12·1 answer
  • What is the probability of the next elk caught in the park being unmarked? Write the probability as a fraction, a decimal number
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!