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erica [24]
3 years ago
11

The number of mold cells doubles every 12 minutes. At this moment, there are x mold cells present on a piece of bread. Which of

the following represents the number of mold cells present one hour from now?
Mathematics
1 answer:
lisabon 2012 [21]3 years ago
5 0

Answer:

Step-by-step explanation:

Suppose that at time t_0 we have x mold cells. We are told that after 12 minutes the amount present is double. That is a t= t_0+12 we have 2x cells. Then, at t = t_0+24 we have (2x)*2 = 4x. We can continue as follows

t: t_0+36 we have (4x)*2 = 8x.

t: t_0+48 we have (8x)*2 = 16x

t: t_0+60 (one hour later) we have (16x)*2 = 32x.

So after one hour from now we have 32x cells.

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If
Tju [1.3M]

Answer:

Step-by-step explanation:

Rationalize the denominator of b. So, multiply the numerator and denominator by \sqrt{x}

b = \frac{(1-2\sqrt{x}) *\sqrt{x}}{\sqrt{x}*\sqrt{x}  }=\frac{1*\sqrt{x} -2\sqrt{x} *\sqrt{x} }{\sqrt{x} *\sqrt{x} }\\\\=\frac{\sqrt{x} -2x}{x}\\

Now, find a +b

a +b = \frac{2x+\sqrt{x} }{x}+\frac{\sqrt{x} -2x}{x}\\\\=\frac{2x+\sqrt{x} +\sqrt{x} -2x}{x}

Combine like terms

= \frac{2x-2x+\sqrt{x} +\sqrt{x} }{x}\\\\=\frac{2\sqrt{x} }{x}

Now find (a + b)²

(a +b)² = (\frac{2\sqrt{x} }{x})^{2}

          = \frac{2^{2}*(\sqrt{x} )^{2}}{x^{2}}\\\\= \frac{4* x}{x^{2}}\\\\= \frac{4}{x}

Hint: \sqrt{x} *\sqrt{x}  =\sqrt{x*x}=x

5 0
2 years ago
the subway train can hold a 792 people on Tuesday 56941 people rode the subway how many trains could 56941 people how many peopl
zubka84 [21]

Answer:

56,149 would be left over

Step-by-step explanation:

56,941-792=56,149

3 0
3 years ago
Y>= -5x + 8 what is m?​
Sonbull [250]

Answer:

The slope = -5

Step-by-step explanation:

y ≥ -5x + 8

Look at the problem as y = -5x + 8 and compare to the slope intercept form. The slope = -5

6 0
3 years ago
A tree casts a shadow 24 feet long. a 5 foot person casts a 8 foot shadow.How tall is the tree?
ra1l [238]
(length of tree's shadow)/(height of tree) = (length of person's shadow)/(person's height)

24/x = 8/5

24*5 = x*8

120 = 8x

8x = 120

8x/8 = 120/8

x = 15

The tree is 15 feet tall
8 0
3 years ago
What is 10,000+70 x 800- 50
aleksklad [387]

Answer:

65950

Step-by-step explanation:

10,000 + 70 x 800 - 50

10,000 + 56,000 - 50

66,000 - 50

65950

3 0
3 years ago
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