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qaws [65]
4 years ago
13

An exponential function f(x)= ab^x passes through the points (0,10) and (3,1250). What are the values of a and b?

Mathematics
2 answers:
ioda4 years ago
8 0
A = 10 and the next would probably be b=5
natka813 [3]4 years ago
6 0

Answer:

a = 10 and b = 5

Step-by-step explanation:

We write out f(x)= ab^x for x = 0 and x = 3 to create two equations in a and b that must be solved simultaneously:

(0, 10):  10 = a*b^0

This tells us that 10 = a*1, or a = 10.

(3, 1250):  1250 = a*b^3 => 10*b^3, or

1250 = 10*b^3, or

125 = b^3.  Taking the cube root of both sides, we obtain b = 5.

a = 10 and b = 5

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A need help Dilations-He Said, She Said (12/10)
Elodia [21]

Answer:

We conclude that the original triangle ΔDEF is dilated by a scale factor of 5/2 to get the image triangle ΔD'E'F'.

Therefore, 'Cárl' is correct. Hence, option 'a' is correct.

Step-by-step explanation:

Checking the location of the vertices of the original triangle ΔDEF

  • D(-2, 4)
  • E(2, 4)
  • F(0, 2)

Checking the location of the dilated vertices of the image triangle ΔD'E'F'

  • D'(-5, 10)
  • E'(5, 10)
  • F'(0, 5)

Notice that if we multiply the vertices of the original triangle ΔDEF by 5/2, we get the correct image vertices of image triangleΔD'E'F'

i.e.

D(-2, 4) → D'(5/2 (-2), 5/2 (4))  → D'(-5, 10)

E(2, 4) → E'(5/2 (2), 5/2(4))  → D'(5, 10)

F(0, 2) → E'(5/2 (0), 5/2(2))  → F'(0, 5)

Thus, we conclude that the original triangle ΔDEF is dilated by a scale factor of 5/2 to get the image triangle ΔD'E'F'.

Therefore, 'Cárl' is correct. Hence, option 'a' is correct.

6 0
3 years ago
The radius of a sphere is increasing at a rate of 5 mm/s. How fast is the volume increasing (in mm3/s) when the diameter is 40 m
jeka94

9514 1404 393

Answer:

  8000π mm^3/s ≈ 25,133 mm^3/s

Step-by-step explanation:

The rate of change of volume is found by differentiating the volume formula with respect to time.

  V = 4/3πr^3

  V' = 4πr^2·r'

For the given numbers, this is ...

  V' = 4π(20 mm)^2·(5 mm/s) = 8000π mm^3/s ≈ 25,133 mm^3/s

_____

<em>Additional comment</em>

By comparing the derivative to the area formula for a sphere, you see that the rate of change of volume is the product of the area and the rate of change of radius. This sort of relationship will be seen for a number of different shapes.

4 0
3 years ago
The Changs updated their bedroom by purchasing a new lamp for $89.95 and a comforter set for $239.99. They paid 6 3/5 sales tax
Kisachek [45]
First, add the price of the lamp and comforter.
$239.99
+   89.95
=329.94
Then put 6 3/5 into a decimal:
3/5= .6
6.6%
Then change it from a % by dividing by 100.
6.6%= .066
Then multiply 329.94 by 1.066
329.94 x 1.066 = 351.716
                          = 351.72
So, yes. they paid the correct amount 
7 0
4 years ago
You pay a down payment of $80, which is 20% of the total, for a new laptop. How much does the laptop cost?
I am Lyosha [343]

Answer:

huijhghyujhbvghyu

Step-by-step explanation:

huijhghyujhhyuijghyujh

4 0
3 years ago
A trapezoid has an area of 780 square meters. The height of the trapezoid is 40 ​meters, and the length of the longer base is tw
o-na [289]

Answer:

idk I'm just here for points sorry bro

6 0
3 years ago
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