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Lina20 [59]
3 years ago
7

Pls help asap! Yesterday, Lexy trimmed a tree that was 8.7 feet tall in her backyard. Now the tree stands is at the height of 6

feet tall. What is the percent of decrease when Lexy trimmed her tree?
Mathematics
2 answers:
Kay [80]3 years ago
6 0
Answer is 31.03% or did u need it in full answer I recommend subtracting and wetting it out
Anni [7]3 years ago
4 0

Answer:

31.03%

Step-by-step explanation:

Very simple

6/8.7 and you get the percentage of tree left. Which is 68.97% (rounded

You subtract that from 100 to get how much was removed.

100-68.97=31.03%

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6 0
3 years ago
Which exponential function goes through the points (1, 16) and (4, 128)?
djyliett [7]

Answer:

Here is the complete question (attachment).

The function which represent the given points are f(x)=8(2)^{x}

Step-by-step explanation:

We know that a general exponential function is like,y=a(b)^{x}

We can find the answer by hit and trial method by plugging the values of (x,y) coordinates.

Here we are going to solve this with the above general formula.

So as the points are (1,16) then for x=1,\ y=16

Can be arranged in terms of the general equation.

ab^1=16...equation(1) and ab^4=128...equation(2)

a\times b=16, then\ a=\frac{16}{a}

Plugging the values in equation 2.

We have

\frac{16}{b} b^4=128,16\times b^3=128,b=\sqrt[3]{\frac{128}{16}} =\sqrt[3]{8}=2

Plugging b=2 in equation 1.

We have a=\frac{16}{b} =\frac{16}{2} =8

Comparing with the general equation of exponential a=8 and b=2

So the function which depicts the above points =y=8(2)^x

From theoption we have B as the correct answer.

7 0
4 years ago
40 point.!!!! HELP ME PLEASE MY MOM GONNA YELL AT ME
scoundrel [369]

Question 1)

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y = 12.5x

Question 3)

Keith is burning 300 calories in 30 minutes. His rate per minute is 10 calories per minute. The equation for Keith is

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3 years ago
You are tiling a 1 square metre bathroom with 10cm square tiles. The exact number of the tiles needed is yet unknown because you
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We cannot determine the cost of the tiles from the given information, so the question cannot be answered.
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The formula for the circumference of a circle is C = 2r, where r is the radius and C is the circumference. The equation solved f
Lubov Fominskaja [6]

Answer:

r = c/2pi

Step-by-step

c= pi*d

d=2r

c = 2*r*pi

6 0
3 years ago
Read 2 more answers
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