Answer:
2 km/h
Step-by-step explanation:
Let
Rate of river current = x km/h
Speed of Peter's boat = 4x km/h
He takes 15 km trip up (opposite direction)
His speed upstream = 4x - x
= 3x
His speed is 3x and distance is 15 km
Time = Distance / Speed
15/3x
= 5/x
And
Moving downstream (same direction)
Speed will be 4x + x = 5x
Distance = 15km,
speed = 5x
Time = Distance / Speed
= 15/5x
= 3/x
Total time take for trip = 4 hours
Total time take for trip = upstream + downstream
4 =5/x + 3/x
4 = 8/x
Cross product
4 * x = 8
x = 8/4
x = 2
Rate of river current = x km/h
= 2 km/h
Use product rule: x^a x^b = x^a + b
a^5 + 4 - 2
Simplify 5 + 4 - 2 to 7
Answer: a^7
Answer = The string would be 4pi feet longer than the Earth's circumference at the surface at about 12.5 feet.
(hope this helps)
Answer:
-7 15/7 , √49, 7.7 , 187 / 24
Step-by-step explanation:
-7 15 / 7 is negative so it would be the least value
the square root is 7
7.7 has an infinite number of the decimals of 7 so it is greater than the previous two, however 187 / 24 is greater because it is equal to 7.79
good luck, hope this helps
Answer:
38.43 sales tax, 597.43 total price
Step-by-step explanation:
559x.06875=38.43 sales tax
559+38.43=597.43 total price
