The total distance of a race is 18.9 km.
a. if volunteers set up a water station every 0.7 km, including one at the finish line, how many stations will they have?
b. if volunteers set up a first aid station every 0.9 km, including one at the finish line, how many stations will they have?

a. 27 stations.

b. 21 stations.

Step-by-step explanation:

a. Given total distance:

According to the exercise it will be a water station every 0.7 kilometers (at the finish line will be a water station too).

Therefore, in order to calculate the number of stations  they will have, you need to divide the total distance by 0.7 kilometers. Then:

 b. Since they set up a first aid station every 0.9 kilometers, including one at the finish line, you need to divide the total distance by 0.9 kilometers in order to find the number of stations they will have

answer with step-by-step explanation:

a. ∠j is supplementary to ∠k - true:

(opposite angles of a trapezoid are supplementary which means that they add up to 180 degrees)

b. kl is parallel to jm - true:

(opposite sides are parallel to each other in a trapezoid)

c. jk is perpendicular to kl - false:

(clearly, jk does not make a right angle with kl)

d. jk is parallel to lm - false:

(jk and lm are two lines opposite in direction to each other so they cannot be parallel)

e. ∠j is congruent to ∠m - true:

(the angles on each side of the base are congruent)

f. ∠j is congruent to ∠k - false:

(the angles on the same side but opposite side of the base are not congruent)

2,600 divided by 80 = 32.5

step-by-step explanation: