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
irina [24]
3 years ago
6

Triangle PQR is a right triangle. if PQ= 8 , what is PR?

Mathematics
1 answer:
Norma-Jean [14]3 years ago
5 0
It is 30-60-90 triangle, so:

PR=\dfrac{PQ\cdot\sqrt{3}}{2}=\dfrac{8\cdot\sqrt{3}}{2}=\boxed{4\sqrt{3}}

Answer B.
You might be interested in
When authors mean something ________
xeze [42]
That mean something is suspicious because they are hiding something from u
4 0
3 years ago
A driver is 15 feet below the surface of the water 10 seconds after he entered the water and 90 feet below the surface after 40
spin [16.1K]

Answer:

\frac{-75ft}{30sec} or simplified would be \frac{-2.5ft}{sec}

Step-by-step explanation:

In order to calculate the rate of change, we must subtract his end position and end time by the starting position and starting time. We are using the -15 feet since it is below the surface area as the starting position and the 10 seconds as the starting time. We make each of these into a fraction and subtract like so...

\frac{-90ft - (-15ft)}{40sec - 10sec} = rate of change

\frac{-75ft}{30sec} = rate of change

\frac{-2.5ft}{sec} = rate of change

Therefore, we can see that the rate of change of the diver is \frac{-75ft}{30sec} or simplified would be \frac{-2.5ft}{sec}

6 0
3 years ago
A statistics professor gives a survey to each of the 20 students in an introductory statistics course. The survey asks the stude
tekilochka [14]

Answer:

B2 = 0.465 --- Population standard deviation

C2 = 0.216 --- Population Variance

Step-by-step explanation:

Given: Wake-up time data

Required: Determine the population standard deviation and the population variance using Excel

First, enter the given data in Excel

For this question, I entered the data in cell A2 through cell A21

Cell B2 and Cell C2 were used to hold the results of the population standard deviation and the population variance, respectively.

In cell B2, the formula to use is:

=ROUNDUP(STDEV.P(A2:A21),3)

The round function rounds the result to 3 decimal places while STDEV.P calculates the population standard deviation.

So, the result is:

B2 = 0.465

In cell C2, the formula to use is:

=ROUND(VAR.P(A2:A21),3)

The round function rounds the result to 3 decimal places while VAR.P calculates the population variance.

So, the result is:

C2 = 0.216

<em>See attachment for Excel file</em>

Download xlsx
3 0
3 years ago
A spinner is spun 20 times, and the number of times the arrow lands
VARVARA [1.3K]

Answer:

Use language that's easy-to-understand. If there's a piece of vocabulary that you feel needs clarifying, define it!

Step-by-step explanation:

Color

Red

Purple

3 0
2 years ago
Please answer this in two minutes
NeTakaya

Answer:

15

Step-by-step explanation:

Use the Pythagorean Thereom:

r^{2} = 9^{2}+12^{2}

r^{2} = 81+144

r^{2} = 225

r= 15

Please mark me as Brainliest!

8 0
3 years ago
Other questions:
  • What are 12 divided by 630 steps?
    13·1 answer
  • There are fewer than 40 students enrolled in a certain class. If, at a certain time, 2/9 of the students are absent from school
    12·1 answer
  • In a given quadrilateral, each side is parallel to its opposite side and the diagonals are not perpendicular. What could it be?
    8·1 answer
  • Sylvie and Bono hiked to the 6,288-ft summit of Mount Washington, then hiked to Carter Notch Hut for the night. Carter Notch Hut
    10·1 answer
  • PLEASE HELP Trig Idenities
    15·1 answer
  • Solve each by elimination <br> 3x + y = 3<br> -3x + 2y = -30
    13·1 answer
  • Write the mixed number as a percent. <br><img src="https://tex.z-dn.net/?f=1%20%20%5Cfrac%7B1%7D%7B4%7D%20" id="TexFormula1" tit
    5·1 answer
  • I need this answer as soon as possible
    13·1 answer
  • Order the expressions based on their values. Place the expression with the greatest value on top.
    10·1 answer
  • I need help With a geomarty math problem
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!