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Aliun [14]
3 years ago
8

Solve the quadratic equation: -x^2+8x=7

Mathematics
1 answer:
Burka [1]3 years ago
5 0

Answer:

Step-by-step explanation:

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Rewrite the radical as a rational exponent. the cube root of 2 to the seventh power
posledela
I would say the answer is B because A would be going to a thousand and you dont wanna do that so i think its a 50% chance its B

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Step-by-step explanation:

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The initial size of the population is 300. After 1 day the population has grown to 800. Estimate the population after 6 days. (R
Cloud [144]

Solution :

Given initial population = 300

Final population after 1 day = 800

Number of days = 6

∴ $\frac{dP}{dt} =kt^{1/2} $

P(0) = 300    P(1) = 300

We need to find P(8).

$dP = kt^{1/2} dt$

$ \int 1 dP = \int kt^{1/2} dt$

$P(t) = k \left(\frac{t^{3/2}}{3/2}\right)+c$

$P(t)= \frac{2k}{3}t^{3/2} + c$

When P(0) = 300

$300 = \frac{2k}{3} (0)^{3/2} + c$

∴ c = 300

∴ $P(t)= \frac{2k}{3}t^{3/2} + 300$

When P(1) = 800

$800 = \frac{2k}{3} (1)^{3/2} + 300$

$500 = \frac{2k}{3}$

∴ k = 750

$P(t)= 500t^{3/2} + 300$

So, P(8) is

$P(t)= 500(8)^{3/2} + 300$

        = 11,614

So the population becomes 11,614 after 8 days.

8 0
3 years ago
Three students each calculated the volume of a sphere with a radius of 6 centimeters.
Anna71 [15]

Answer:

Not sure if this is correct, so sorry if not but I agree with diego.

Step-by-step explanation:

Given: A sphere of radius 6 cm

Find: Volume

Volume = 4/3 π x 6³ cm³

Volume = 288 π cm³

Therefore the volume of the sphere is 288 π cm³

3 0
3 years ago
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A stray dog ate 25 of your muffins that was 5/6 of all of them with how many did you start?
Maru [420]

Answer:

30 = total muffins

Step-by-step explanation:

To determine how many muffins were eaten, we take the total muffins times the fraction that were eaten

eaten muffins = total muffins * fraction

25 = total muffins* 5/6

Multiply each side by 6/5

6/5*25 = total muffins *5/6*6/5

30 = total muffins

3 0
4 years ago
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