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3 years ago

Choose the answer that correctly simplifies the equation: 3 x (6 x 7 – 2.5 x 4)

Mathematics

2 answers:

ad-work [718]3 years ago

7 0

D) 96 because you do PEMDAS left to right

Andre45 [30]3 years ago

5 0

3 x (6 x 7 – 2.5 x 4)
=3 x (42-10)
=3 x 32
=96
answer D) 96

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The doubling period of a bacterial population is 15 minutes. At time t= 80 minutes, the bacterial population was 90000

Papessa [141]

Answer:

here i finished!

hope it helps yw!

Step-by-step explanation:

The doubling period of a bacterial population is 15 minutes.

At time t = 90 minutes, the bacterial population was 50000.

Round your answers to at least 1 decimal place.

We can use the formula:

A = Ao*2^(t/d); where:

A = amt after t time

Ao = initial amt (t=0)

t = time period in question

d = doubling time of substance

In our problem

d = 15 min

t = 90 min

A = 50000

What was the initial population at time t = 0

Ao * 2^(90/15) = 50000

Ao * 2^6 = 50000

We know 2^6 = 64

64(Ao) = 50000

Ao = 50000/64

Ao = 781.25 is the initial population

Find the size of the bacterial population after 4 hours

Change 4 hr to 240 min

A = 781.25 * 2^(240/15

A = 781.25 * 2^16

A= 781.25 * 65536

A = 51,199,218.75 after 4 hrs

6 0

3 years ago

26. A(-4, -1), B(-4, 6), C(2,6), D(2, -4)

Fudgin [204]

Answer:

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Step-by-step explanation:

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2 years ago

A car travels 2 1/3 miles in 3 1/2 minutes at a constant speed. Write an equation to represent the car travels in miles and minu

Korvikt [17]

Answer:

d = 0.666t , where d is in miles and t is in minutes.

d = 39.94h, where d is in miles and h is in hours.

Step-by-step explanation:

A car travels $2\frac{1}{3} = 2.33$ miles in $3\frac{1}{2} = 3.5$ minutes at a constant speed.

Let the relation between the distance (d) traveled by car in miles after traveling t minutes is d = kt ......... (1)

Now, putting d = 2.33 miles and t = 3.5 minutes in the above equation we get,

2.33 = 3.5k

⇒ k = 0.666 (Approx.)

So, the equation (1) becomes d = 0.666t. (Answer)

Let us assume that the relation between the distance (D) traveled by car in miles after traveling h hours is d = Kh ............ (2)

Now, putting D = 2.33 miles and T = 3.5/60 = 0.058 hours in the above equation, we get

2.33 = 0.058K

⇒ K = 39.94

So, the equation (2) we get, d = 39.94h (Answer)

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3 years ago

Which function described as the arithmetic sequence below 1,-2,-5,-8,-11

motikmotik

Answer:

-3 it subtracts if you take 1and go back 3 times you get -3 same. for negative -5 back -3 is -8

Step-by-step explanation:

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3 years ago

Read 2 more answers

choli [55]

Answer:

where is the figure????

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3 years ago