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masha68 [24]
3 years ago
11

A car advertisement states that a certain car can accelerate from rest to 70 km/h in 7 seconds. Find the cars average accelerati

on. I will mark brainly please show work
Mathematics
1 answer:
Ray Of Light [21]3 years ago
3 0

Answer:

v_0(initial velocity)           v_f(final velocity)     a(acceleration)

v_0=70 km/h    v_f= 0 km/h( rest)

Kinematics equation is a=(v_f-v-0)/time

a=(0-70)/(7/3600)  which means it decelerates at -36000 km/h

This number is humongous; I would advise you to re-check the problem and see if the the time it takes is 7 hours rather than 7 seconds. Notice that I put the time as 7/3600 because it is 7 seconds which should be converted to hours.



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Mattison's favorite clothing store is having a sale.Jeans are 25% off mattison bought 2 pairs of jeans that were originally pric
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Answer:

Mattison paid 54 after the discounts for 2 jeans.

Step-by-step explanation:

Original price of the jeans = 35.99

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So, the actual amount paid for 1 jeans = Actual Price - Discounted amount

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3 years ago
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6 0
4 years ago
The table shows the travelling time to work of 50 people.
Crank

Answer:

24.8 mins

Step-by-step explanation:

Time > timemark > frequency

0 – 10 > 10/2 = 5 > 5

10 – 20 > (10+20)/2 = 15 > 15

20 – 30 > (20+30)/2 = 25 > 13

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40 – 50 > (40+50)/2 = 45 > 7

The mean time for the 50 people is given by:

Mean = summation (mid time x frequency) / total frequency

Mean = [5x5 + 15x15 + 25x13 + 35x10 + 45x7] / 50

Mean = [25 + 225 + 325 + 350 + 315] / 50

Mean = 1240 / 50

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