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Vlada [557]
3 years ago
12

While testing a new vaccine, a lab technician noticed that the number of bacteria reduced by half every minute. How long does it

take for 3,000 bacteria to reduce to 375?
Mathematics
1 answer:
Kaylis [27]3 years ago
4 0
It takes three minutes for the bacteria to get to 375. to do this you put the equation 3000÷2^x, (^x means to the X power) where X is the amount of minutes, and obviously 3000 is the start amount.
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Pick the digit in the one billion place 263,136,816,799
Sophie [7]

Answer: 3

3,000,000,000

Step-by-step explanation:

Billions have 9 zeros

5 0
2 years ago
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The volume of a cylinder is 980pi in ^3 The height of the cylinder is 20 in. What is the radius of the cylinder?
siniylev [52]

Answer:

The radius of the cylinder is 7 in

Step-by-step explanation:

To calculate the radius of a cylinder we have to use the following formula:

v = volume  = 980π in³

h = height = 20in

π = pi

r = radius

v = (π * r²) * h

we replace with the known values

980π in³  = (π * (r)²) * 20in

980π in³ / 20in = π * (r)²

49 in² = (r)²

√(49 in²) = r

7 in = r

The radius of the cylinder is 7 in

7 0
3 years ago
Simplify the expression -2+6.45z-6+(-3.25z)
erik [133]

Answer:

-8 + 3.2z

Step-by-step explanation:

  1. when there is a "+" in front of an expression in parentheses, the expression remains the same
  2. -2 + 6.45z - 6 - 3.25z
  3. calculate the difference

-8 + 6.45z - 3.25z

collect like terms

-8 + 3.2z

8 0
3 years ago
Find the quotient of quantity of 3 times x to the 3rd power plus 9 times x to the 2nd power minus 6 times x all over negative 3
ki77a [65]
            -x^2  -3x    + 2
        ------------------------------
-3x )  3x^3 + 9x^2 - 6x
          3x^3 
                    9x^2
                             -6x

answer is -x^2 - 3x + 2
3 0
3 years ago
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Trevor earns $7.80 an hour take home pay and works 20 hours each week. Trevor wants to buy a new laptop computer to take to coll
Naily [24]
It would take him 5 weeks. why?
7.89*20= $156 per week
156*5 weeks= $780
4 0
4 years ago
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