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LUCKY_DIMON [66]
3 years ago
15

The velocity of a car was 30m/s when the driver pushed the brake of the car and it stopped after 2 seconds. Assume that the acce

leration was constant during the braking time.find the acceleration and the distance cut during the braking
Mathematics
1 answer:
Murljashka [212]3 years ago
3 0

Answer:

the "acceleration" is -15m/s (it's negative because it is slowing down, not speeding up[it might just be a positive 15m/s if it is called deceleration and not acceleration])

Step-by-step explanation:

30m/s (starting speed)/2 (the number of seconds it took to stop from 30m/s

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The Elster family drove 9.25 hours on the first day of their road trip. How many minutes is this equivalent to?
butalik [34]

Answer:

555 minutes

Step-by-step explanation:

5 0
3 years ago
Q4. A simple random sample of size n=180 is obtained from a population whose size=20,000 and whose population proportion with a
IgorLugansk [536]

Answer:

np = 81  , nQ = 99

Step-by-step explanation:

Given:

X - B ( n = 180 , P = 0.45 )

Find:

Sampling distribution has an approximate normal distribution

Computation:

nP & nQ ≥ 5

np = n × p

np = 180 × 0.45

np = 81

nQ = n × (1-p)

nQ = 180 × ( 1 - 0.45 )

nQ = 99

Therefore, sampling\ distribution\ has\ an\ approximately\ normal\ distribution.

3 0
3 years ago
Sylvia earns $7 per hour at her after school job. After working one week she recieved a paycheck for $91. Write and solve an equ
Mashutka [201]
Amount of hours worked = h
7h = 91
h = 13 hours worked that week 
h (is greater to or equal to) 15
7 x 15 would equal 105 which means the most she can make in a week is $105

3 0
3 years ago
Choose the situation in which the use of exact number is most appropriate.
Lelu [443]
Ordering laptops. Much more expensive. Higher consequences. 
7 0
2 years ago
Priya noticed in the last activity that between the 2 triangles, you only need to know 4 angles to show that they are similar. S
ValentinkaMS [17]

Answer:

Please find attached a drawing of the triangles ΔRST and EFG showing the angles

The angle on ΔEFG that would prove the triangles are similar is ∠F = 25°

Step-by-step explanation:

In order to prove that two triangles are similar, two known angles of each the triangles need to be shown to be equal

Given that triangle ∠R and ∠S of triangle ΔRST are 95° and 25°, respectively, and that ∠E of ΔEFG is given as 90°, then the corresponding angle on ΔEFG to angle ∠S = 25° which is ∠F should also be 25°

Therefore, the angle on ΔEFG that would prove the triangles are similar is ∠F = 25°.

3 0
3 years ago
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