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Luba_88 [7]
3 years ago
7

The resting heart rates for a sample of individuals are normally distributed with a mean of 70 and a standard deviation of 15. U

se the 68-95-99.7 rule to find the percentage of heat rates greater than 55
Mathematics
1 answer:
Liono4ka [1.6K]3 years ago
7 0

Answer:

84%

Step-by-step explanation:

The empirical rule states that 68% values are within 1 standard deviation of mean, i.e,

70

±

15

or from 55 to 85. Since normal distribution is symmetric, we must have (32%) outside this range, and 32/2=16% on the right if this range. Hence below 85 we have (100-16) % = 84%

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Find the total surface area of the square pyramid in the figure.<br><br> thanks!!
Viefleur [7K]

Answer:

B: 144 yd²

Step-by-step explanation:

It's a square pyramid : Base area 8 x 8 = 64

4 side area:((8 x5) /2) x 4 = 80

Total area: 64 +80 = 144

5 0
3 years ago
Figure TUVS is a parallelogram.
poizon [28]

Angles T and V of the parallelogram are equal to 91°.

Calculating the Value of x

In the parallelogram TUVS, adjacent angles U and V are given as,

U = 4x+9

V = 6x-29

Since U and V are adjacent angles, and as per the properties of a parallelogram, sum of adjacent angles is equal to 180°.

4x+9 + 6x-29 = 180

10x - 20 =180

10x = 200

x = 20

Calculating the Angles of the Parallelogram

∠U = 4x + 9

∠U = 4(20) + 9

∠U = 80 + 9

∠U = 89°

∠V = 6x - 29

∠V = 6(20) - 29

∠V = 120 - 29

∠V = 91°

According to the properties of a parallelogram, opposite angles are of equal measure.

∴ ∠T = ∠V and ∠S = ∠U

⇒ ∠T = 91° and ∠S = 89°

Learn more about a parallelogram here:

brainly.com/question/1563728

#SPJ1

5 0
2 years ago
If 4x²+ y²= 40 and xy = 6 , find the value of (2x − y).
ziro4ka [17]

answer is 2x+y=±8

hopes this helps u

8 0
3 years ago
Read 2 more answers
Write a recursive formula for a n a n , the n th n th term of the sequence 6 , − 12 , 24 , . . .
Anton [14]

Answer:

See below ↓↓

Step-by-step explanation:

a₁ refers to the first term of the sequence.

That is clearly : a₁ = <u>6</u>

<u></u>

The formula for the nth term is :

  • aₙ = a₁rⁿ⁻¹
  • Common ratio (r) = quotient of consecutive terms
  • r = -12/6 = -2

Therefore, the nth term is :

  • aₙ = <u>6(-2)ⁿ⁻¹</u>
4 0
2 years ago
Line K passes through the points (6,3) and (-2,-4) what is the slope perpendicular to K
Afina-wow [57]

-8/7

6- -2= 8

3- -4=7

rise over run the slope of K is 7/8

perpendicular is the negative inverse of the slope so it ends up as -8/7

6 0
3 years ago
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