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likoan [24]
3 years ago
10

#21 is already done but 22 is so confusing Help please!

Mathematics
1 answer:
riadik2000 [5.3K]3 years ago
6 0
(I'm not 100% sure this is accurate)

I got 4m/-4n.

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Find a formula for geometric series that begins with 28, 98, 343,...​
otez555 [7]

Answer:

Step-by-step explanation:

In a geometric series, the successive terms differ by a common ratio which is determined by dividing a term by the preceding term.

The formula for determining the nth term of a geometric progression is expressed as

Tn = ar^(n - 1)

Where

a represents the first term of the sequence.

r represents the common ratio between successive terms in the sequence.

n represents the number of terms in the sequence.

From the seies shown,

a = 28

r = 98/28 = 343/98 = 3.5

The formula representing the nth term of the given sequence would be expressed as

Tn = 28 × (3.5)^(n - 1)

6 0
3 years ago
A tree was 17 feet tall when it was planted. It grew 8 times that height in 15 years.
Nataliya [291]

Answer:

A. 119 feet

Step-by-step explanation:

the height of tree right now =

17 × 8 = 136 feet

the differences = 136 -17 = 119 feet

6 0
3 years ago
Read 2 more answers
Watch help video
ollegr [7]

Answer: 15309

hope this helps, the nth term calulation is (7/3) times 3^n

6 0
2 years ago
A 120-watt light bulb uses about 0.1 kilowatt of electricity per hour. If electricity costs $0.20 per kilowatt hour, how much do
saveliy_v [14]
There is no such thing as a "kilowatt per hour". If that's actually what the question says, then it's a defective question, and you should put it away before it makes you any more confused. A 120 watt light bulb uses exactly 0.12 kilowatt when it's turned on. In one hour, it uses (0.12 kilowatt) x (1 hour) = 0.12 kilowatt-hour of energy. If energy costs $0.20 per kilowatt-hour, then the cost is (0.12) x (0.20) = 2.4 cents. (0.024 dollar)
8 0
3 years ago
A forest Cover 78000 acres. A survey finds that 0.7% of the forest is old-growth trees. How many acres of old-growth trees are t
kolezko [41]

Answer:

THE acres of old growth is 78,007

3 0
3 years ago
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