# Find the percent of decrease from 210 to 120. round to the nearest tenth if necessary. a. 75% b. 42.9%

Find the percent of decrease from 210 to 120. round to the nearest tenth if necessary. a. 75% b. 42.9% c. 0.8% d. 175%​

## This Post Has 10 Comments

4

Step-by-step explanation:

3 72/120

÷24 ÷24

3 3 / 5 = 3 + 3/5 = 3 + 6/10 = 3 + 0.6 = 3.6 ≈ 4 rounded to the nearest half since 3.6 is closer to 4 than 3

2. miraclewhipppp says:

On the way up, 1.8 seconds and on the way down 4.1 seconds.

Step-by-step explanation:

Use the  motion under gravity  equation s = ut + 0.5gt^2 where u = initial velocity, s = the height, t = time and g = acceleration due to gravity ( 32 fts-2).

So 120 = 95t + 0.5(-32)t^2

-16t^2 + 95t - 120 = 0

Solving this using the quadratic formula:

t = [-95 +/- √(95^2 - 4 * -16*-120)] / -32

t = 1.823, 4.1148.

The first value refers to the upward journey and the second to the downward journey.

3. tiffanydowell13 says:

the difference from 240 to 120 is 50%

4. chrisraptorofficial says:

Sqrt 120 rounded to the nearest hundredth = 10.95

5. davidebner2248 says:

4x² + 43 = 120
4x² = 120 - 43
4x² = 77
x² = 77/4
x² = 19.25
x = ±√19.25
x = ±4.39

The solutions are ±4.39

6. lizzyhearts says:

8.9

Step-by-step explanation:1 is less then 5 so you round down

7. reneebrown017 says:

Step-by-step explanation:

Given that,

Velocity of the ball in the air is , v = 95 ft/s

We need to find the time when the ball is at a height of 120 feets. The equation of projectile is given by the following formula :

$h(t)=-16t^2+vt$

Here, h(t) = 120 feets

$-16t^2+95t-120=0$

On solving above equation, we get the value of t as :

t = 1.823 s

t = 4.115 s

Therefore, at 1.823 seconds and 4.115 seconds the ball is at a height of 120 feets.

8. Jennifer2019 says:

8 9

Step-by-step explanation:

1 is less that 5 therefore the 9 does not change its value

9. 19King73 says:

1. 18 cent per apple

2. 84

3.\$9.10

4. 460 meters

Step-by-step explanation:

1. divide 1.45 by 8 to get price per apple

1.45/8=0.18

2. convert 70% into a decimal

70%=.70

multiply by amount

120(.70)=84

3. convert 20% into a decimal

20%=.20

multiply by amount

45.50(.20)=9.10

4. 1 meter = 100 cm therefore 4.6 meters = 460 cm

10. hdbvhf says:

42.9%

Step-by-step explanation:

-42.857142857142854 is the exact number. Rounded to 42.9% thus b: is the correct answer.

Formula:

[(120 - 210) / 210] × 100% = -0.42857142857142855 × 100% = -42.857142857142854%