At hockey practice, Coach Taylor always sets aside 20% of the total time for plays to warm up. The rest of the practice is spent on game play. Today practice is 60 minutes, Coach Taylor needs to find out how much time players should spend warming up.

Step-by-step explanation:

Proportion of time set aside for players to warm up = 20%

If the total time, today, is 60 minutes, time for warm up = 20% of 60 minutes

= 20% ×  60 = 0.2 × 60 = 12 minutes

a28=58

step-by-step explanation:

a1=a1+(n-1)d

a28= 4+ (28-1)2

a28=4+(27)(2)

a28=4+54

a28=58