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aleksandr82 [10.1K]

3 years ago

15

a small dog’s heart beats about 530,000,000 times during its lifetime, and a large dog’s heart beats about 1.4 times this amount

. What is the approximate number of heartbeats in the lifetime of a large dog?

1 answer:

iren2701 [21]3 years ago

6 0

Answer:

I think the answer is 742,000,000

Step-by-step explanation:

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Evaluate sin^2 (pi/4) + cos^2(pi/4) + cos.

mart [117]

The answer of $sin^2 (pi/4) + cos^2 (pi/4)$ is √ 2

<u>Step-by-step explanation:</u>

The value of $sin^2 (pi/4)$ = √2/ 2

The value of $cos^2 (pi/4)$ = √2/ 2

= √2/ 2 + √2/ 2

= √2 + √2 / 2

= 2 √2 / 2

Dividing √2 by 1

= √2

3 0

3 years ago

A worker at a landscape design center uses a machine to fill bags with potting soil. Assume that the quantity put in each bag fo

ddd [48]

Answer:

Mean = 15.15

Standard deviation = 0.6062

Step-by-step explanation:

We are given a uniform distribution of quantity to be put in each bag.

Low and high filling weights:

14.1 pounds and 16.2 pounds

a = 14.1

b = 16.2

a) Mean:

$\mu = \displaystyle\frac{a+b}{2}\\\\\mu = \frac{14.1+16.2}{2} = 15.15$

b) Standard Deviation:

$\sigma = \sqrt{\displaystyle\frac{(b-a)^2}{12}}\\\\= \sqrt{\dfrac{(16.2-14.1)^2}{12}} = \sqrt{0.3675} = 0.6062$

4 0

3 years ago

Diane's Coffee Shop makes a blend that is a mixture of two types of coffee. Type A coffee costs Diane

Shalnov [3]

4.05x+5.25(149-x)=710.25
Solve for x
X=60 ........4.05

149-60=89.....5.25

5 0

3 years ago

H I wanted to ask if that in high school math is harder than middle school?

Mariana [72]

Answer:

Yes, it is harder.

Step-by-step explanation:

8 0

2 years ago

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F(x) = 3x + 8; g(x) = 5x - 9<br> (a) Find (f + g)(x).

AysviL [449]

Answer: f(x) = 8x -1

Step-by-step explanation:

( f + g )x = 3x + 5x + 8 - 9

( f + g)x = 8x - 1

8 0

3 years ago