The first one is C. Hope this helps!! If you need anymore help just message me and I will try to get back to you quickly and help in any way i can!
Answer:
![\boxed {\boxed {\sf 4\ m/s^2}}](https://tex.z-dn.net/?f=%5Cboxed%20%7B%5Cboxed%20%7B%5Csf%204%5C%20m%2Fs%5E2%7D%7D)
Explanation:
Acceleration is the rate of change of an object with respect to time. It is the change in velocity over the time.
![a= \frac{v_f-v_i}{t}](https://tex.z-dn.net/?f=a%3D%20%5Cfrac%7Bv_f-v_i%7D%7Bt%7D)
The car starts at 10 meters per second and increases to 20 meters per second in 2.5 seconds.
= 20 m/s
= 10 m/s - t= 2.5 s
Substitute the values into the formula.
![a= \frac{ 20 \ m/s - 10 \ m/s}{2.5 \ s }](https://tex.z-dn.net/?f=a%3D%20%5Cfrac%7B%2020%20%5C%20m%2Fs%20-%2010%20%5C%20m%2Fs%7D%7B2.5%20%5C%20s%20%7D)
Solve the numerator.
![a= \frac{10 \ m/s}{2.5 \ s}](https://tex.z-dn.net/?f=a%3D%20%5Cfrac%7B10%20%5C%20m%2Fs%7D%7B2.5%20%5C%20s%7D)
Divide.
![a= 4 \ m/s/s](https://tex.z-dn.net/?f=a%3D%204%20%5C%20m%2Fs%2Fs)
![a= 4\ m/s^2](https://tex.z-dn.net/?f=a%3D%204%5C%20m%2Fs%5E2)
The acceleration of the car is <u>4 meters per second squared.</u>
Answer:
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Answer:
Not between significant digits.
Explanation:
A zero not significant when it's not between significant digits.