Answer:
4.6 hours
Step-by-step explanation:
we first need to calculate the total distance he covered and total time taken whole for the journey.
Distance= speed X time
time = Distance/speed
let the total distance be X. he covers 2/5 if the journey first.
2/5 = 0.4
Time = 0.4x/45 hours
the remaining journey is 3/5x
he covers 1/3 X 3/5= 0.2x
time taken = 0.2/90 X hours
the remaining distance = 100× 1.2 = 120km
we add 0.4x + 0.2x to get the fraction he had covered
0.6x.
the remaining distance was X - 0.6x = 0.4 X
thus 120 km represents 0.4x of the journey
we calculate now the value of X
0.4x = 120
X = 300km
Total time taken = 0.4x/45 + 0.2/90 + 1.2 hours
replace X to get time
2.7 hours + 0.7 hours + 1.2 hours
= 4.6 hours
2 3/4 divided by 1/4
is
2 3/4 multiplied by 4/1
which is (2+3/4)*4 = 2*4 + 3/4*4 = 8+3 =<em>11</em>
Answer:
d
Step-by-step explanation:
the answer is d 17 miles/gallon
Answer:
13.05MbpS < x < 22.15 Mbps
Step-by-step explanation:
Confidence interval CI can be expressed in the form;
Lower bound < x < upper bound
Given;
CI = (13.046, 22.15)
Lower bound = 13.046 = 13.05 Mbps (to two s.f.)
Upper bound = 22.15 Mbps
So, the Confidence interval is given as;
13.05 MbpS < x < 22.15 Mbps
Yes because 0.13 is equal to 0.130
