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Shkiper50 [21]
3 years ago
11

Milie mode 20 cookies for her class's porty, 8 of the

Mathematics
1 answer:
nadezda [96]3 years ago
8 0

Answer:

40%

Step-by-step explanation:

It is 40% because 8/20 times 5 is 40/100 and that is 40%.

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The resting heart rate of US females 20 years old or older is normally distributed with a mean of 75 bpm (beats per minute). Sup
Sergio [31]

Answer:

69 bpm

Step-by-step explanation:

Here we start out finding the z-score corresponding to the bottom 33% of the area under the standard normal curve.  Using the invNorm( function on a basic TI-83 Plus calculator, I found that the z-score associated with the upper end of the bottom 33% is -0.43073.

Next we use the formula for z score to determine the x value representing this woman's heart rate:

       x - mean                              x - 75 bpm

z = ----------------- = -0.43073 = --------------------

       std. dev.                                    15

Thus,  x - 75 = -0.43073(15) = -6.461, so x = 75 - 6.6461, or approx. 68.54, or (to the nearest integer), approx 69 bpm

7 0
3 years ago
Add the following complex numbers: (4-10i)+(7-3i)
krek1111 [17]

Answer: its 11-13i

Step-by-step explanation:

7 0
3 years ago
HELPS PLS
k0ka [10]

Answer:

C

Step-by-step explanation:

7 0
2 years ago
100xy , 75xyz helpppppppp
Simora [160]
Yes bro because 100x75
3 0
2 years ago
Solve 3x+3=21<br><br> Show your work
Alina [70]

Answer: 6

Step-by-step explanation: 21-3=18 so that reduces to 3x=21 then 3÷21=6 so that'll be x=6

5 0
2 years ago
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