Answer:
12
Step-by-step explanation:
Answer:
150
Step-by-step explanation:
Rate at which volume decrease:
(1 × 2 × 20/100) ÷ 30
= 1/75 m³/min
Total volume:
½ × (1.4 + 0.6) × 2 × 1
= 2 m³
Time = 2 ÷ 1/75
= 150 mins
Answer:
31
Step-by-step explanation:
use a step by step calculator.
Answer:
14
Step-by-step explanation:
Answer:
12 2/3 km per hour
Step-by-step explanation:
What is Harveys speed?
Take the distance and divide by the time
3 1/6 km
--------------
1/4 hour
Change the mixed number to an improper fraction
3 1/6 = (6*3+1)/6 = 19/6
19/6 km
--------------
1/4 hour
Copy dot flip
19/6 * 4/1 = 76/6 = 38/3 km/hr
3 goes into 38 12 times (12*3 = 36) with 2 left over
12 2/3 km per hour