A hot air balloon descends to the ground. The function h(t) = 210 – 15t can be used to describe the altitude of the balloon as i
2 answers:
Answer:
Option c
Step-by-step explanation:
Given that a hot air balloon descends to the ground.
The function
can be used to describe the altitude of the balloon as it approaches the ground.
Here t = time and h = height
Since t cannot be negative we can t starting from 0
t can take any fractional value and h is well defined for any value of t positive
So option c is right
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Recall your d = rt, distance = rate * time.
so, in his usual speed, say is hmm "r" mph, so in his usual "r" speed, he rolls on for the 48 miles and it takes him "t" hours to get there.
now, if he increases his speed by 2 mph, then his new speed is "r + 2", and he arrives there 4 hours earlier, so if he took "t" hours going at "r" speed, then when he's going faster at "r + 2", he only takes "t - 4" hours, for the same 48 miles.
it cannot be a negative value, since is just a forward speed rate, so can't be -6.
so, in his usual speed, say is hmm "r" mph, so in his usual "r" speed, he rolls on for the 48 miles and it takes him "t" hours to get there.
now, if he increases his speed by 2 mph, then his new speed is "r + 2", and he arrives there 4 hours earlier, so if he took "t" hours going at "r" speed, then when he's going faster at "r + 2", he only takes "t - 4" hours, for the same 48 miles.
it cannot be a negative value, since is just a forward speed rate, so can't be -6.
Answer:
49
Step-by-step explanation:
Every time you multiply both sides of a rectangle by a number x, its area if multiplied by .
In our example:
Area of a rectangle = width . length
width = 4
length = 7
= 4 . 7 = 28
When you multiply both sides by 7:
width = 4 . 7 = 28
length = 7 . 7 = 49
= 28 . 49
= 1372
/
= 1372 / 28 = 49 =
Both sides multiplied by 7 => Area multiplied by
Got it?
;-)