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SVETLANKA909090 [29]
3 years ago
12

Amswerrr pleaseeeee helppp

Mathematics
2 answers:
jekas [21]3 years ago
6 0
She ran 4.5 meters per second, remember: speed=distance/time
Snowcat [4.5K]3 years ago
3 0
4.5 speed is distance divided by time <span />
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Write the number 0.000 000 7 in standard form.
mestny [16]

Answer:

7 x 10^-7

Step-by-step explanation:

3 0
2 years ago
Please explain how to do #6 i know the work is right but i don’t understand it
mariarad [96]
Since this is part of a packet, there's a lot of prior knowledge you need to understand the question.
1) The angle of elevation is the angle between the horizontal and the light of sight from the object to the observer (see picture 1).

2) A lot of the units are from work done by an Indian astronomer. The line of sight (light blue in picture 1) is r = 3438 (I think you might have forgotten to finish writing the number). r, or 3438, is the distance from the earth to the sun used by Indian Astronomers. 

3) The table shows units in jya(θ<span>°). Jya is a Sanskrit (ancient Indian language) word. It stands for the length of half of a chord that connects two endpoints of a circle (kinda confusing and more information than you need to know - but it's the green line in picture 2).
What's important is: </span>jya(θ°) = r*sin(θ°)



Now let's tackle the problem:
1) You know that the angle of elevation is 67.5°. Using the chart, the only important value is the second from the bottom. jya(67.5°) = 3177. 

2) Remember that jya(θ°) = r*sin(θ°). 
Also remember that sine of an angle is \frac{opposite}{hypotenuse}. In this problem, r, the distance from the earth to the sun, happens to be the hypotenuse of the triangle since its the longest edge. 

3) Notice that you're dividing jya(θ°) (aka r*sin(θ°)) by r = 3438. That will give you sin(θ°) by itself. Then you're multiplying that sin(θ°) by 1 AU, which we are told is the actual distance of the hypotenuse/distance from earth to sun. Since sine = \frac{opposite}{hypotenuse} that gives you the apparent length of the opposite side = apparent height of the sun.

The math is a bit weird, but you're basically multiplying sine by the apparent distance 1AU to get the apparent height, instead of multiplying sine by the estimated height r = 3438. Dividing 3177 by 3438 gives you sin(67.5°). Then multiplying sin(67.5°) by the apparent hypotenuse, 1AU, gives you the apparent height. That's how I'm understanding it!

6 0
3 years ago
Gina bought 2.5 pounds of peaches that cost $1.38 per pound at the grocery store. amy went to the local farmer's market and purc
devlian [24]
Gina 2.5 * 1.38 = $3.45
Amy 3.5 * .98 = $3.43
Gina spent more money by .02

7 0
3 years ago
Read 2 more answers
Multiply. Answers should be in simplest form.<br> 3/7 x10
chubhunter [2.5K]

Answer:

4.28

I think this it. I used a calculator online to help solve this problem. I don't know what the answer is but I used an online calculator to solve the problem. I rounded the answer to the nearest hundreth.

5 0
3 years ago
When 31 times a number is increased by 40, the answer is the same as when 200 is decreased by the number
mojhsa [17]

31x+40=200-x\\32x=160\\x=160/32\\x=5

The number is 5.

3 0
3 years ago
Read 2 more answers
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