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weeeeeb [17]
3 years ago
10

NEED HELP PLEASE

Mathematics
1 answer:
ludmilkaskok [199]3 years ago
4 0

Answer:

16 feet, 18 feet, and 25 feet.

Step-by-step explanation:

<h2><u><em>PLEASE MARK AS BRAINLIEST!!!!!</em></u></h2>
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If you help I will give you brainliest
hammer [34]

9514 1404 393

Answer:

  5 miles

Step-by-step explanation:

Time/speed/distance problems can be worked a number of ways. Here, we want to know the distance walked. We know the total time and the total distance and the two different speeds. So, we can use a variable to represent the value we want to know: w = distance walked (in miles).

The total time is 9:00 -6:50 = 2:10 = 2 1/6 hours = 13/6 hours.

The total time is the sum of times for the two parts of the trip: walking and riding.

  walking time = walking distance/walking speed

  = w/3

  riding time = riding distance/riding speed

  = (20-w)/30

The total time is that given above:

  w/3 +(20-w)/30 = 13/6

  10w +(20 -w) = 65 . . . . . . . . multiply by 30

  9w = 45 . . . . . . . . . . . . subtract 20, collect terms

  w = 5 . . . . . . . . . . . divide by 9

The girl walked 5 miles.

8 0
3 years ago
Find the missing side of the triangle and leave the answer in simplest radical form.
tatuchka [14]

Answer:

x = \sqrt5

Step-by-step explanation:

Using Pythagoras theorem,

Square of longer side = Sum of square of other sides .

Therefore,

(\sqrt{11})^2 = x^2 + (\sqrt{6})^2\\\\11 = x^2 + 6\\\\11 - 6  = x^2\\\\5 = x^2\\\\x = \sqrt 5

6 0
3 years ago
Read 2 more answers
What are the first two steps in solving the radical equation below? X-6+5 = 12 O A. Subtract 5 from both sides and then add 6 to
arlik [135]

Answer:

L speed

Step-by-step explanation:

7 0
3 years ago
A pharmacist receives a shipment of 22 bottles of a drug and has 3 of the bottles tested. If 5 of the 22 bottles are contaminate
Norma-Jean [14]

Answer:

There is a 44.16% probability that exactly 1 of the tested bottles is contaminated.

Step-by-step explanation:

C_{n,x} is the number of different combinatios of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

In this problem, we have that:

Total number of combinations:

C_{22,3} = \frac{22!}{3!(18)!} = 1540

Desired combinations:

It is 1 one 5(contamined) and 2 of 17(non contamined). So:

C_{5,1}*C_{17,2} = 5*17*8 = 680

What is the probability that exactly 1 of the tested bottles is contaminated?

P = \frac{680}{1540} = 0.4416

There is a 44.16% probability that exactly 1 of the tested bottles is contaminated.

5 0
3 years ago
Carlos is filling a spherical balloon with water. if he increases the volume of the balloon from 4,188.79 cubic centimeters to 1
Harrizon [31]

We know that the volume of a sphere of radius r is given by

V=\frac{4}{3}\pi r^3

Now, we have been given the initial volume was 4,188.79 cubic centimeters. Let us find the radius at this time.

Substituting the value of volume in the above equation, we get

4,188.79=\frac{4}{3}\pi r^3\\&#10;\\&#10;4\pi r^3=4,188.79 \times 3\\&#10;\\&#10;r^3=\frac{4188.79 \times 3}{4\pi}\\&#10;\\&#10;r^3=1000\\&#10;\\&#10;r=10

Now, the final volume is given by 14,137.167 cubic centimeters. Thus, we have

14137.167 =\frac{4}{3}\pi r^3\\&#10;\\&#10;4\pi r^3=14137.167  \times 3\\&#10;\\&#10;r^3=\frac{14137.167\times 3}{4\pi}\\&#10;\\&#10;r^3=3375\\&#10;\\&#10;r=15

Now, let us find the surface areas for these two radii.

For r=10

Surface area is given by

S=4\pi r^2\\&#10;\\&#10;S=4\times 3.14 \times (10)^2\\&#10;\\&#10;S=1256 \text{ square centimeters}

Similarly, for

r=15\\&#10;\\&#10;S=4\times 3.14\times (15)^2\\&#10;\\&#10;S=2826 \text{ square centimeters}

Therefore, the increase in the surface area is given by

\Delta S= 2826-1256= 1570 \text{ square centimeters}

Hence, the average rate at which the surface area is changing is given by

\frac{1570}{12}=130.8

Therefore, the average rate at which the surface area is changing is given by 130.8 square centimeters per second.

7 0
3 years ago
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