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3 years ago

9

When a grizzly bear hibernates, its heart rate drops to 10 beats per minute, which is 20% of its normal

1 answer:

geniusboy [140]3 years ago

5 0

50 beats per minute

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Solve for x. Round to the nearest tenth, if necessary.

e-lub [12.9K]

Answer:

$\boxed {\boxed {\sf x \approx 1.9}}$

Step-by-step explanation:

We are asked to find x, a missing side in a triangle.

This is a right triangle because there is a small square in the corner representing a 90 degree or right angle. Therefore, we can use right triangle trigonometry. The three main functions are:

sinθ= opposite/hypotenuse
cosθ= adjacent/hypotenuse
tanθ= opposite/adjacent

Examine the triangle. We will use angle S, measuring 54 degrees, for theta. Side QR, measuring x, is <u>opposite</u> angle S. Side QS, measuring 2.3, is the <u>hypotenuse</u> because it is opposite the right angle. Since we have the opposite and hypotenuse, we will use sine.

$sin \theta = \frac {opposite}{hypotenuse}$

θ= 54
opposite= x
hypotenuse = 2.3

$sin (54)= \frac{ x}{2.3}$

We are solving for x, so we must isolate the variable. It is being divided by 2.3 The inverse operation of division is multiplication, so we multiply both sides by 2.3

$2.3* sin (54)= \frac{x}{2.3}*2.3$

$2.3* sin (54)=x$

$2.3*0.8090169944=x$

$1.860739087 =x$

Round to the nearest tenth. The 6 in the hundredth place to the right tells us to round the 8 up to a 9.

$1.9 \approx x$

x is approximately <u>1.9</u>

7 0

3 years ago

Mr. Quentin asks his students to describe a circle. Which description can be used as a mathematical definition of a circle? the

mr_godi [17]

Answer:

D. The set that all points in a plane equidistant from a common point.

Step-by-step explanation:

8 0

3 years ago

Joe mauer throws a baseball from first base to second at a rate of 90 miles per hour. How fast did Joe throw the ball in feet pe

deff fn [24]

Lol that's me ...........

6 0

3 years ago

You are researching the price of MP3 players. You found an average price of $58.80. One MP3 player costs $56 and another costs $

Butoxors [25]

The price of third MP3 player is $58.40

Step-by-step explanation:

Given,

Cost of one MP3 palyer = $56

Cost of another MP3 player = $62

Average price of MP3 player = $58.80

Let,

Cost of third MP3 player = x

Average = $\frac{Sum\ of\ costs}{Number\ of\ items}$

${58.80}=\frac{56+62+x}{3}$

Multiplying both sides by 3

$3*{58.80}=\frac{56+62+x}{3}*3\\176.40=118+x\\176.40-118=x\\58.40=x\\x=58.40$

The price of third MP3 player is $58.40

Keywords: average, division

Learn more about division at:

#LearnwithBrainly

8 0

3 years ago

15 POINTS!! PLEASE HELP ASAP!!

insens350 [35]

Answer:

Total number of kilometers in the ride = 5 km

Number of kilometers Garret has already biked = k km

Number of kilometers Garret left to ride = 5 - k km

Number of minutes Garret takes per kilometer = 4 minutes.

Step-by-step explanation:

1. It takes 4 minutes for Garret to go a kilometer. Then

Number of minutes Garret takes per kilometer = 4 minutes.

2. Suppose the variable $k$ is the number of kilometers Garret has already biked.

3. Garret is partway through a 20-minute bike ride. It takes 4 minutes for him to go a kilometer. Then

Total number of kilometers in the ride is

$20\div 4=5\ km$

4. Suppose the variable $k$ is the number of kilometers Garret has already biked. Then $5-k$ km is the number of kilometers Garret left to ride.

6 0

3 years ago