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lesya692 [45]
3 years ago
8

The senior classes at Portland High School and Biddeford High School planned separate

Mathematics
1 answer:
den301095 [7]3 years ago
3 0
I believe it would be 47
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The temperature is -3 °C at 6 a.m. and rises 12 °C by midday.<br> What is the temperature at midday?
Pavlova-9 [17]

Answer:

9 C at midday

Step-by-step explanation:

5 0
3 years ago
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A biologist recorded a count of 348 bacteria present in a culture after 5 minutes and 1088 bacteria present after 20 minutes. To
Nat2105 [25]

Answer:

The initial bacteria population is 238

Step-by-step explanation:

Let us have the increase as an exponential equation

P(t) = I(1 + r)^t

where P(t) is the count at a particular time

r is the percentage increase

I is the initial population

t is the time

So for 5 minutes, we have

348 = I(1 + r)^5

For 20 minutes

1088 = I(1 + r)^20

Divide the second equation by the first

1088/348 = I(1 + r)^20/I(1 + r)^5

3.13 = (1 + r)^15

Take the ln of both sides

ln 3.13 = 15 ln (1 + r)

ln 3.13/15 = ln (1 + r)

0.0761 = ln (1 + r)

1 + r = e^0.0761

1 + r = 1.079

r = 1.079-1

r = 0.079 which is 7.9%

So per minute. we have an increase of 7.9%

So let’s get I by substituting

From;

348 = I(1 + 0.079)^5

348/1.079^5 = I

I = 237.9 which is 238 to the nearest whole number

4 0
3 years ago
Brad put 10 crickets in his pets lizard cage. After one day, Brad's lizard had eaten 50% of the crickets he had put in the cage.
Artemon [7]

Answer:

There are 4 crickets left

Step-by-step explanation:

10/2=5

20% of 5 is 1

5-1=4

Don't forget to brainliest me

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3 years ago
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Write each number as a sum of integers in three different ways.1. 52. +153. O
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Solution:

Given:

\begin{gathered} 5 \\ +15 \\ 0 \end{gathered}

An integer is a whole number (not a fractional number) that can be positive, negative, or zero.

Writing each number as a sum of integers in three different ways,

\begin{gathered} 5=0+5 \\ 5=3+2 \\ 5=-2+7 \\  \\  \\ +15=11+4 \\ +15=8+7 \\ +15=1+14 \\  \\  \\ 0=-2+2 \\ 0=-5+5 \\ 0=-1+1 \end{gathered}

8 0
1 year ago
Aidan has four cards with +, –, ×, ÷ printed on them.
fiasKO [112]

Answer:

5 x 4 + 2 - 3 / 1

Step-by-step explanation:

Took me a lot of tries but got it! :) Hope this helps

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3 years ago
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