A bird's weight W is frequently related to the length L of its wing span. For one species of bird the formula W=1.8L could be used to predict a bird's weight Win kilograms for a wing span of L meters.
a) If a bird has a wing span of 0.75 meter, estimate its weight.
b) If a bird has a wing span of 1.5 meter, estimate its weight.
c) If the wing span of a bird doubles, what happens to its weight?

0.6

39mph

step-by-step explanation:

- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

runner a ⇒ speed = (2-0)/(1-0)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."

a

step-by-step explanation: