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jeka57 [31]
3 years ago
14

A falling object accerlates from -10.0m/s to -30.0m/s how much time does that take

Mathematics
1 answer:
Leya [2.2K]3 years ago
5 0

Answer:

2.04 seconds

Step-by-step explanation:

Falling objects near the surface of the earth have an acceleration of -9.81 m/s².

Acceleration is the change in velocity over change in time:

a = (v − v₀) / t

-9.81 = (-30.0 − (-10.0)) / t

-9.81 = -20.0 / t

t = 2.04

It takes 2.04 seconds.

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Sam makes bread rolls he gets 2/5 of the bread rolls to his neighbor and 4/9 the remainder to his cousin he has 15 bread left ho
Kitty [74]

Answer:

  Sam made 45 rolls

Step-by-step explanation:

After giving some to his neighbor, Sam has 1 -2/5 = 3/5 of the original quantity left. After giving some to his cousin, he has (3/5)(1 -4/9) = (3/5)(5/9) of the original quantity left.

  (3/5)(5/9) = 3/9 = 1/3

  15 rolls = (1/3)·(original number) . . . . . . Sam has 15 roll left

  45 rolls = original number . . . . . . . . . . . multiply by 3

_____

<em>Check</em>

Same gave 2/5·45 = 18 rolls to his neigbor, so had 27 left. Sam gave 4/9·27 = 12 to his cousin, so had 15 left.

3 0
3 years ago
Read 2 more answers
The numerator and denominator of a fraction are in the ratio of 3 to 5. If the numerator and denominator are both increased by 2
butalik [34]

Answer:

The correct answer is A) 5n = 3d and 3n + 6 = 2d + 4

Step-by-step explanation:

hope this is right...

6 0
4 years ago
|
FromTheMoon [43]

Area : Multiply the two numbers

13*8=104 yd^2

Perimeter: Add the two numbers two times

Perimeter : 13+8+13+8=42 yd

Answer:

Area is 104yd^2

Perimeter is 42yd

8 0
4 years ago
3/4 of a piece of metal has a mass of 15kg.what is the mass of 2/5 of the piece of metal
olga2289 [7]
3/4=15
let,
total mass is x
x=4×15/3
=20 kg
so, total mass = 20 kg

=2×20/5
=2×4
=8 kg

Hope this helps!
8 0
3 years ago
Which relationship describes angles 1 and 2?<br><br> SELECT EACH CORRECT ANSWER!!!!
nata0808 [166]
One box marked should be complementary because the angles add up to 90 degrees. And the second answer would be adjacent angles.
8 0
3 years ago
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