Answer:
<h2>a) Average velocity = 278 units</h2><h2>b)
Instantaneous velocity at t = 7 seconds is 148 units</h2>
Step-by-step explanation:
a) Average velocity is the ratio of displacement to time.
We have
s(t) = t³ + t
t is in between 7 and 12
s(7) = 7³ + 7 = 350
s(12) = 12³ + 12 = 1740
Displacement = 1740 - 350 = 1390
Time = 12 - 7 = 5
Displacement = Average velocity x time
1390 = Average velocity x 5
Average velocity = 278 units
b) s(t) = t³ + t
Differentiating
v(t) = 3t² + 1
At t = 7
v(t) = 3 x 7² + 1 = 148 units
Instantaneous velocity at t = 7 seconds is 148 units
The spider doesn't move during the seconds of 7 through 11
Answer:
the answer for the operation that should be used to solve x+7 is -7
18- answer is 120
to find this:
first find the remaining angle in ABF
180-(55+40)=180-95=85
F has two angles. if F1 is 85 F2 is 85,too.(coterminal angles)
now you can find the interior angle of CDF
180-(35+85)=180-120=60
the you should find the exterior angle(exterior angle + interior angle =180)
180-60=120
x=120
20
x=48
y=82
ABC is parallel to EF
so to find x: 180-132=48
and for y:
180-((180-130)+48)=180-(50+48)=180-98=82
hope this helps
Answer:
48
Step-by-step explanation:
89 - 41 = 48
they have to add up to 89
