Step-by-step explanation:
so, the 200m winner's average speed was
200m/(60+57)sec = 200/117 m/s
so, 400m with the same speed would need x seconds :
200x/117 = 400
200x = 400×117
x = 2×117 = 234 seconds = 3 minutes and 54 seconds
(after seeing that a minute has 60 seconds, and that then 234/60 = 3 and 54 remainder).
so, she would have reduced her time by 10 seconds (from 4 minutes 4 seconds down to 3 minutes 54 seconds = 4 + 6 = 10).
Answer:
Option B
80 in²
Step-by-step explanation:
Volume, V of any shape is the product of cross-sectional area and height. Therefore, V=Ah
Where A is the cross sectional area and h is the height.
Making A the subject of the formula then
A=V/h or V÷h
Substituting 400 in³ for V and 5 in for h then
A=400 in³÷5 in=80 in²
Therefore, the area of base is 80 in²
Answer:
a 1.42×10 hello .Mark as brainlist
Answer:
9
Step-by-step explanation:
Answer:
m = 2600
Step-by-step explanation:
0.12m = 78 + 0.09m
0.12m - 0.09m = 78 + 0.09m - 0.09m
0.03m = 78
m = 2600
Make sure to double check!
2600 x 0.12 = 78 + 0.09 x 2600
312 = 78 + 234
312 = 312
