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umka21 [38]
3 years ago
13

at the park, people can climb a rope ladder to its top. rosa climbed 2/8 of the up the ladder. Justin climbed 2/6 of the way up

the ladder. who climbed higher on the rope ladder?
Mathematics
1 answer:
Lerok [7]3 years ago
7 0
Well if you make the denominater of the fraction the same, aka finding the lowest common multiple you can find out so what you do is 8 and 6 both go into 24 8 goes into 24 3 times and 6 goes 4 times so you multiply the numerator by how many times the denominator goes into the LCM(lowest common multiple) and get 6/24 and 8/24 meaning justin climbed higher
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False
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Mary spent half of her allowance going to the movies . She washed the family car and earned seven dollars . What is her weekly a
Debora [2.8K]
If Mary spent half of her allowance the equation will begin with 1/2x or 0.5x where x is her allowance and 0.5 is half of her allowance spent. Mary also earned 7 dollars by washing the car so this will be added to her allowance spent.
The problem says that after Mary has spent half of her allowance at the movies she was left with 18 dollars so that means that the equation must be equal to 18.

The equation you want to set up is

0.5x+7=18
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Thus, Mary has a weekly allowance of 22 dollars.
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3 years ago
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
Manuela claims that ab and pq are congruent
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