Answer:
2 mph
Step-by-step explanation:
time = distance / speed
Let c represent the rate of the current. Then the upstream rate of the boat relative to the shore is (5c -c) = 4c, and the <em>upstream time</em> is ...
... 12/(4c) = 3/c.
Likewise, the downstream rate is (5c +c) = 6c, and the <em>downstream time</em> is ...
... 12/(6c) = 2/c.
The <em>total time</em> is the sum of upstream and downstream times:
... 3/c +2/c = 2.5
... 5/c = 2.5 . . . . . . combine terms
... 5/2.5 = c = 2 . . . multiply by c/2.5
The exponent is 6, since 7^6 is the same as (see picture).
Answer:
the square root of 1620
Step-by-step explanation:
1. x^2=18^2+36^2
2. x^2=324+1296
3. x^2=1620
4. x= The square root of 1620
Answer:
c; 1 / (a^12)(b^8)
Step-by-step explanation:
when the exponent is outside a number you multiply the outside exponent by the inside exponent
so far after multiplying exponents you have
a^-12 / b^8
but you must put the 12 on the bottom so that all exponents can be positive
1 / (a^12)(b^8)
Answer:9 5/6
Step-by-step explanation:
