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3 years ago

Question 22a and 22b

Mathematics

1 answer:

ludmilkaskok [199]3 years ago

6 0

A: $456,000
B; 4,560 bumpercarts

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Scientists can estimate the number of bacteria in a refrigerated food using the formula 0.26=

monitta

Time is C. 50 seconds

Step-by-step explanation:

The population of bacteria at time t here is given by

$0.2b=\frac{t^2}{20}$

where

b is the number of bacteria

t is the time in seconds

Here we want to find the approximate time at which the number of bacteria is

b = 625

Substituting into the equation and solving for t, we find:

$t^2=20\cdot 0.2 b\\t=\sqrt{4b}=\sqrt{4\cdot 625}=50 s$

Therefore, the solution is

C. 50 seconds

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brainly.com/question/10689103

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3 years ago

What is the image of

Ugo [173]

Answer:

Step-by-step explanation:

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2 years ago

Find the greatest common factor of x^2 and 15xy. A. 1 B. 15 C. x D. 15xy

Sindrei [870]

C. x is the greatest common factor because it is the only term from these answer choices that is a factor of both terms.

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3 years ago

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Julia is going to the store to buy candies. Small candies cost $4 and extra-large candies cost $12.She needs to purchase at leas

BartSMP [9]

Answer:

Small candies $=9$

Extra large candies $=12$

Step-by-step explanation:

Let small candies $=x$

Extra large candies $=y$

the number of candies is at least $20$ .

$x+y\geq20$

Cost of $1$ small candy $=\$4$

Cost of $1$ extra large candy $=\$12$

but she has only $\$180$ to spend

$4x+12y\leq180$

Solve for

$x+y=20.......(1)\\4x+12y=180.....(2)\\eqn(2)-eqn(1)\times4\\8y=100\\y=\frac{100}{8} \\y=\frac{25}{8} \\from\ eqn(1)\\x+\frac{25}{2}=20\\ x=20-\frac{25}{2} \\x=\frac{15}{2}$

Since number of candies should be integer.

let $x=7,y=13$

total spend $4\times7+12\times13=184$ which is more than $\$180$ , so this combination is not possible.

$let\ x=8,y=12\\8\times4+12\times12=176$

She has $\$4$ more so she can buy $1$ more small candy.

Hence small candy $=9$

extra large candy $=12$

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2 years ago

51 miles on a 3 gallon of gas find the unit rate

Sauron [17]

Answer:

Step-by-step explanation:

(51 miles)/(3 gal) = 19 miles/gal

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3 years ago

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