Speed of the boat = u
speed of the current = v
in downstream,
u - v = 105/5
u - v = 21
in upstream
u + v = 105/7
u + v = 15
add both equations
2u = 36
u = 18
v = -3
so
speed of the boat = 18 km/h
speed of the current = 3 km/h
Based on the social security tax rate and the Medicare tax, the monthly Social security is $109.12 and the Medicare tax is $25.52.
<h3>What is monthly social security act?</h3>
Graham, C. has not reached the $128,400 threshold for social security so the Social Security tax withholding for the month will be:
= Monthly salary x Social security rate
= 1,760 x 6.2%
= $109.12
The Medicare has no limit and so will be:
= 1,760 x 1.45%
= $25.52
Find out more on Social Security and Medicare at brainly.com/question/27677508.
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512, the formula for volume is length x width x height :)
(x-1)(x+1)(x-3)(x+3)
x²-y² formula
Mark brainliest please
