You spend 90 minutes wrapping gifts and baking cookies. The ratio of time spent on wrapping gifts to time spent on baking cookies is 7:8. How much time do you spend wrapping gifts?

42

Step-by-step explanation:

7 * 90/15 = 42

constant acceleration- a

constant velocity- c

no velocity or acceleration- b

explanation:

for body moving with a constant acceleration, the rate of change of displacement changes over time. this is proven by the increasing gradient of the curve (a) against time.

a body that is moving at constant velocity covers equal distances over equal periods of time, thus the straight line with a constant gradient c.

a stationary body   covers no displacement as time elapses. thus the flat line with   zero gradient.

i think it is c, not positive though

step-by-step explanation: