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yarga [219]
3 years ago
5

Can someone help me with these problems step by step? It’s pre-algebra so it’s not rlly that hard.

Mathematics
1 answer:
gtnhenbr [62]3 years ago
5 0

Answer:

11

Step-by-step explanation:

√121=11 so right answer is B

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Pls help due at 2:00
slamgirl [31]

Answer:

1. $8.77

2. 498.456

Step-by-step explanation:

4 0
2 years ago
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What is the answer to this question 8 1/2- 7 1/4
zysi [14]
1 1/4 because you must make improper fractions
4 0
3 years ago
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The mass of a bacteria culture doubles every four days. If the initial sample is 5mg: a) how much will you have after one week (
maks197457 [2]

Answer:

a) 16.82 mg

b) 24 days

Step-by-step explanation:

Formula for exponential growth is given as:

A=A_0b^{\frac{t}{c}}

Where A is the final population

A_0 is the initial population

b is the growth factor

c is the time taken for the growth 'b'

t is the amount of time

Here, We are given the following:

A_0 = 5 mg

b = 2 (Given because it doubles)

c = 4 days

a) A = ?

Using the formula:

A=5 \times 2^{\frac{7}{4}}\\\Rightarrow A=5 \times 2^{1.75} \\\Rightarrow A = \bold{16.82\ mg}

b) Given

A = 320 mg

t = ?

Using the above formula again:

320 = 5 \times 2^{\frac{t}{4}}\\\Rightarrow \dfrac{320} 5= 2^{\frac{t}{4}}\\\Rightarrow 2^{\frac{t}{4}} = 64\\\Rightarrow 2^{\frac{t}{4}} = 2^6\\\Rightarrow \dfrac{t}{4} = 6\\\Rightarrow t = 6 \times 4\\\Rightarrow \bold{t = 24\ days}

So, the answers are:

a) 16.82 mg

b) 24 days

6 0
3 years ago
Describe and correct the error in writing 39/40 as a percent 39/40= 0.975 = 9.75/100=9.75%
Alexus [3.1K]
10% is the answer I think
5 0
3 years ago
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I need the description of how to draw a parallel line and a perpendicular line.
EleoNora [17]
How to Draw Parallel Lines:
1. Draw a straight line any length

2. Draw another straight line any length

(note : ensure the lines will never intersect)

They shall never horizontally or vertically.

How to Draw Perpendicular Lines:
1. Draw a straight line vertically

2. Draw a straight line horizontally

(note : length does not necessarily matter)

The two lines must cross at right angles to each other!!

With the parallel line instructions, simply just draw lines but, when given the slopes of two lines, you must get graphing paper or make your own, and graph it by plotting points and then getting a ruler and tracing it.

With the perpendicular lines it helps with showing a relation between situations along with given slopes. They shall intersect always and meet at a 90° angle. Use the equations and plot them then take a ruler and trace them and notice the intersection. Solve it yourself and see that the intersection and the answers you got are the same.
5 0
3 years ago
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