Answer:
a) The missing terms are 9, 13, 21 and 25.
b) If we know that and , then the n-th term of the sequence is represented by .
Step-by-step explanation:
a) Given that elements of the sequence are found by increasing by the same amount, we infer that elements are part of an arithmetical progression. The rate of progression is now determined:
The missing terms are:
The missing terms are 9, 13, 21 and 25.
b) The formula for the arithmetical progression is represented by the following formula:
(1)
Where:
- First element of the sequence.
- Indicator associated with the element of the sequence.
- Progression rate.
If we know that and , then the n-th term of the sequence is represented by .
9514 1404 393
Answer:
t = 1 1/7 ≈ 1.1429 seconds
Step-by-step explanation:
Filling in the given height, we can solve for t:
640 = -490t^2 +1120t
49t^2 -112t +64 = 0 . . . . . divide by 10, put in standard form
(7t -8)^2 = 0
t = 8/7 . . . . . . . the value of t that makes the factor(s) zero
The model rocket will reach its maximum height of 640 cm after 1 1/7 seconds.
The square root is 41.9332803391. To double check, multiply 41.9332803391 by 41.9332803391, which gave me 1758.4.
I hope this helps!
Answer:
280ft
Step-by-step explanation:
360/18=20
20x14=280