answer.
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
kap26 [50]
2 years ago
11

In a survey of students, 80% were girls and 20% were boys. of the girls surveyed, 40% were wearing sneakers. if a surveyed stude

nts is selected at random, what is the probability the student is a girl wearing sneakers?
Mathematics
1 answer:
prisoha [69]2 years ago
3 0

Answer:

\frac{8}{25}

Step-by-step explanation:

probability of selecting a girl from students is \frac{4}{5}

probability of girl wearing sneaker from girls is \frac{4}{10} or \frac{2}{5}

hence, probability of selecting a girl wearing a sneaker will be,

⇒ probability = probability of delecting a girl from students × probability of girl wearing sneakers from girls

⇒ probability = (\frac{4}{5})( \frac{2}{5})

⇒ probability = \frac{8}{25}

You might be interested in
A car travels 17 miles on one gallon of gas.
ehidna [41]

Answer:

y ranges from 2890 miles to 5780 miles.

Step-by-step explanation:

Let us call y the number of miles the car travels, and x the number of gallons of gas that are used, then we have the relationship

y=17x <em>(this says the car travels 17 miles for each gallon of gas).</em>

Now, when x=170, we have

y=17(170)

y=2890\: miles

and when x=340, we have

y=17(340)

y=5780\:miles

So, when x goes from 170 to 340, y goes from 2890 to 5780.

Therefore, when x ranges from 170  to 340 gallons, the distance traveled ranges from 2890 to 5780 miles.

5 0
1 year ago
Five and nine tenths in expanded form and standard
nika2105 [10]

Answer:

  • 5×1 +9×0.1
  • 5.9

Step-by-step explanation:

The verbiage "five and nine tenths" can refer to the mixed number 5 9/10, or to the decimal in standard form, 5.9. Simply converting the phrase to a decimal gets you the standard form.

The expanded form can be written a number of ways, depending on how you like to show the place value multipliers. The simplest expanded form is simply the sum of the digits:

  5 + 0.9

You can show the multipliers in standard form:

  5×1 + 9×0.1

Or, you can show the multipliers in exponential form:

  5×10⁰ +9×10⁻¹

3 0
2 years ago
The marginal price per pound (in dollars) at which a coffee store is willing to supply x pounds of Jamaican Blue Mountain coffee
il63 [147K]

Answer:

Thus, the coffee shop is willing to supply 6 pounds per week at a price of $4 per pound.

Step-by-step explanation:

We are given the following information in the question:

The marginal price per pound (in dollars) is given by:

p'(x) = \displaystyle\frac{208}{(x+7)^2}

where x is the supply in pounds.

P(x) = \displaystyle\int p'(x)~dx =\displaystyle\int\displaystyle\frac{208}{(x+7)^2}~dx\\\\P(x) = \frac{-208}{(x+7)} + c\\\\\text{where c is the constant of integration.}

The coffee shop is willing to supply 9 pounds per week at a price of $7 per pound.

Thus, we are given that

P(9) = 7

Putting the values, we get,

P(x) = \displaystyle\frac{-208}{(x+7)} + c\\\\P(9) = 7\\\\\displaystyle\frac{-208}{(9+7)} + c = 7\\\\c = 7 + \frac{208}{16} = 20

P(x) = \displaystyle\frac{-208}{(x+7)} + 20

Now, we have to find how many pounds it would be willing to supply at a price of $4 per pound.

P(x) = 4

P(x) = \displaystyle\frac{-208}{(x+7)} + 20 = 4\\\\\frac{-208}{x+7} = -16\\\\x + 7 = 13\\x = 6

Thus, the coffee shop is willing to supply 6 pounds per week at a price of $4 per pound.

3 0
1 year ago
"A compressed gas with a total mass of 107 kg is stored in a spherical container having a radius of 0.521 m. What is the density
Aleksandr-060686 [28]

Answer:

Recall that gas will always take the shape and volume of its container.

Volume of sphere or gas = 4/3.πR³ = 4π/3  x 0.521³,  V = 0.59 m³

Density of the gas, D = mass / volume = 107kg / 0.59m³ , D = 180.60 kg/m³

The density of the compressed gas = 180.60 kg/m³

7 0
1 year ago
Instructions:Type the correct answer in each box. Use numerals instead of words. If necessary, use / for the fraction bar(s). Si
ollegr [7]
6j+1/3n=134 
Hope this helps!!

4 0
2 years ago
Other questions:
  • Milton is floating in an inner tube in a wave pool. He is 1.5 m from the bottom of the pool when he is at the trough of a wave.
    9·1 answer
  • The following section is a statement from the rental agreement at a local auto rental agency. “Upon checkout, the fuel level of
    7·2 answers
  • Please help!!!!!!!!!
    15·1 answer
  • Complete the sentence below. If (3x2 + 22x + 7) ÷(x + 7) = 3x + 1, then (x + 7)(???????) =???? .
    13·2 answers
  • Kim’s lunch cost is 12.74 she included a tip of 15%
    7·1 answer
  • A square ceiling has a diagonal of 23 ft. Shelton wants to put molding around the perimeter of the ceiling. The molding is sold
    7·2 answers
  • The product of a number,and 0.28 is 13.44. which equation matches this statement
    12·2 answers
  • The system of equations y = one-fourth x minus 1 and y = negative one-half x minus one-fourth is shown on the graph below. On a
    10·2 answers
  • What’s 4x4x2-4 in a fraction over 2
    10·1 answer
  • The table shows the height of water in a pool as it is being filled. A table showing Height of Water in a Pool with two columns
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!