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valkas [14]
2 years ago
9

A man has a collection of 19 coins worth $2.55. There are twice as many nickels as dimes. If the rest are quarters, how many qua

rters are there?
Mathematics
1 answer:
likoan [24]2 years ago
6 0

Answer:

7 quarters

Step-by-step explanation:

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A= l x b
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3 years ago
A bacteria culture starts with 1000 bacteria and the number doubles every 40 minutes. (a) find a formula for the number of bacte
vfiekz [6]

The formula for the number of bacteria at time t is 1000 x (2^t).

The number of bacteria after one hour is 2828

The number of minutes for there to be 50,000 bacteria is 324 minutes.

<h3>What is the number of bacteria after 1 hour?
</h3>

The exponential function that can be used to determine the number of bacteria with the passage of time is:

initial population x (rate of increase)^t

1000 x (2^t).

Population after 1 hour : 1000 x 2^(60/40) = 2828

Time when there would be 50,000 bacteria : In(FV / PV) / r

Where:

  • FV = future bacteria population = 50,000
  • PV = present bacteria population = 1000
  • r = rate of increase = 100%

In (50,000 / 1000)

In 50 / 1  = 3.91 hours x 60 = 324 minutes

To learn more about exponential functions, please check: brainly.com/question/26331578

#SPJ1

5 0
2 years ago
Which one is correct?
galina1969 [7]

Answer:

720cm^2

Step-by-step explanation:

i dont think this is right answer

7 0
3 years ago
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38 degrees 2x degrees +6 degrees
ratelena [41]
STEP
1
:
Pulling out like terms

Pull out like factors :

32 - 2x = -2 • (x - 16)

STEP
2
:

Equations which are never true:

2.1 Solve : -2 = 0

This equation has no solution.
A a non-zero constant never equals zero.
Solving a Single Variable Equation:

2.2 Solve : x-16 = 0

Add 16 to both sides of the equation :
x = 16

5 0
3 years ago
Two nickels are flipped and a number cube is rolled. How many total outcomes are there?
Taya2010 [7]

Answer:

2

Step-by-step explanation:

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3 years ago
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