935 of the boxes will weigh 25 oz or less.
The z-score for this value is
Looking this up in a z-table (http://www.z-table.com) we see that the probability of something being less than or equal to this value (the area under the curve to the left) is 0.7794.
Multiply this probability by the number of items:
0.7794(1200) = 935.28 ≈ 935.
Answer:
43 miles/hr
Step-by-step explanation:
Use a conversion factor from km to miles while keeping track of your units:
70 km/hr x 0.62 miles/km = 43 miles/hr
Answer:
3 x 1/10 + 1 x 1/100 + 2 x 1/1000
or
.3 + .01 + .002
Step-by-step explanation:
Answer:
24
Step-by-step explanation:
Initially, there were 80 runners in the race. After the first half, 1/5 of them dropped out (given). Therefore, 4/5*80=64 runners remain. In the second half, 5/8 of these 64 runners drop out, meaning 3/8*64=24 runners finished the race.