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Alex_Xolod [135]
3 years ago
12

In triangle DEF, FE= 12 and angle D =62. find DE to the nearest tenth

Mathematics
1 answer:
Nastasia [14]3 years ago
6 0

Step-by-step explanation:

Below is an attachment containing the solution.

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Suppose your heart is beating 72 times per minute. At this rate, how many times will it beat in 15 minutes?
Vlad1618 [11]
Hey there!

All you need to do is multiply the beats per minute by 15 minutes.
72 x 15=1080. Your heart will beat 1080 times in 15 minutes.

I hope this helps!
8 0
4 years ago
1000 more than the smallest 4 digit number is​
melamori03 [73]

Answer:

1112

Step-by-step explanation:

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3 0
3 years ago
Please help me solve for x
ratelena [41]

Hello from MrBillDoesMath!

Answer:

sqrt(6)

Discussion:

The triangle, while not indicated, appears to be a right triangle (i.e. has a 90 degree angle). If so, from the Pythagorean theorem,

x^2 + 3^2 =   ( sqrt(15) ) ^ 2  =>

x^2 + 9 = 15                          =>  ( subtract 9 from both sides)

x^2   = 15 - 9 = 6                  =>  (take the square root of both sides)

x= sqrt(6)



Regards,  

MrB


7 0
4 years ago
The completion time for an exam is normally distributed with expected value 75 minutes and variance 12 minutes. What is the prob
Debora [2.8K]

Answer:

14.89% or 0.1489

Step-by-step explanation:

First, find the z-score for both 70 and 80 minutes and their corresponding percentile.

z= \frac{X - \mu }{SD} \\SD=\sqrt{V} =\sqrt{12}\\\mu =75\\z= \frac{X - 75}{\sqrt{12}}\\\\

For X = 70 minutes:

z= \frac{70 - 75}{\sqrt{12}}\\z=-1.4434

This z-score is equivalent to the 7.445 th percentile, so the probability of a student finishing this exam in less than 70 minutes is 7.445%

or X = 80 minutes:

z= \frac{80 - 75}{\sqrt{12}}\\z=1.4434

This z-score is equivalent to the 92.555 th percentile, so the probability of a student finishing this exam in more than 80 minutes is 100- 92.555 = 7.445%

Therefore, the probability (P) of a student finishing this exam in less than 70 minutes or more than 80 minutes is:

P = 7.445% + 7.445% = 14.89%

5 0
3 years ago
WILL GIVE BRAINLIESTTTT, FIVESTARS ANDTHANKS<br> PLEASEHELP
SpyIntel [72]

Answer:

3 is the answer

Step-by-step explanation:

answer up above

7 0
3 years ago
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