Answer:
1080 boys
Step-by-step explanation:
2400 x 0.45 = 1080
Correct Question: Find the simplified product: 
Answer:
Step-by-step explanation:
Based on the rules of radicals, since 
and 
has the same index (square root), therefore:
To simplify this, multiply their bases together, and add their exponents.
Simplify further
Answer:
3
Step-by-step explanation:
27 km
9 km every hour
so 27/9=3
Answer:
Let the current speed be "c";
Then the boat speed in still wate is "5c":
-----------------------
Upstream speed:
distance = 12 miles ; rate = 5c-c = 4c mph ; time = 12/4c = 3/c hrs
---------------------------
Downstream speed:
distance = 12 miles ; rate = 5c+c = 6c mph ; time = 12/6c = 2/c hrs
Step-by-step explanation:
Equation:
time + time = 2 1/2 hrs
3/c + 2/c = 5/2
Multiply thru by 2c to get:
6 + 4 = 5c
c = 2 mph (speed of the current)
5c = 10 mph (speed of the boat in still water)
