Can anyone help me Factor.
81-25x^2

Answers

Answer 1

Answer: that is difference of two squares so the answer is (9-5x)(9+5x)

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A bacteriologist estimates that there are 5.2×10^4 bacteria growing in each of 20 petri dishes. About how many bacteria in total are growing in the petri dishes? Express your answer in scientific notation

Answers

Answer:

1X10^6

1.04x10^6

Step-by-step explanation:

You start by multiplying 5.2x10^4 by 20 because there are 20 petri dishes with this amount growing, and you get 1,040,000. Now we need to convert it to scientific notation. We know that 1,000,000 is 10^6, so we would move the decimal to the left 6 places and get 1.04x10^6. This is in scientific notation, but we need to keep in mind significant figures (sig figs), so your final answer would be 1x10^6, if that is not what your instructor is looking for, try 1.04x10^6.

Final answer:

The total amount of bacteria growing in the 20 petri dishes is calculated by multiplying the amount of bacteria in each dish (5.2×10^4) by the number of dishes (20), which gives a result of about 1.04×10^6 bacteria.

Explanation:

Given that there are approximately 5.2×10^4 bacteria in each dish and there are 20 petri dishes, we can find the total amount of bacteria by multiplying these two values together. The calculation is as follows: 5.2×10^4 bacteria/dish * 20 dishes = 1.04×10^6 bacteria. Therefore, there are about 1.04×10^6 bacteria in total growing in the petri dishes.

Learn more about Scientific Notation here:

brainly.com/question/2005529

The graph below shows the distance, y, in miles, of a bee from its hive, for a certain amount of time, x, in minutes:Based on the graph, what is the initial value of the graph and what does it represent?0.4 mile per minute; it represents the speed of the bee
0.4 mile; it represents the original distance of the bee from its hive
4 miles; it represents the original distance of the bee from its hive
4 miles per minute; it represents the speed of the bee

Answers

Answer:

C. 4 miles; it represents the original distance of the bee from its hive

Step-by-step explanation:

We are given,

The graph showing the distance between a bee hive for a certain amount of time.

Now, from the graph, we see that,

When the time is 0 mins, then the distance from the bee hive is 4 miles.

Thus, the initial value of the graph is 4 miles and it represents the original distance of the bee hive from the hive.

So, option C is correct.

4 Miles; it represents the orginal distance of the bee form its hive
the line starting so high up means that that spot is the starting location of the bee

A movie rental store charges a membership fee of $10.00 plus $1.50 per movie rented. What is a possible domain that shows the cost to a member of renting movies? A) The domain is all integers. B) The domain is all even integers. C) The domain is all integers 0 or greater. D) The domain is all integers 10 or greater.

Answers

For the question "A movie rental store charges a membership fee of $10.00 plus $1.50 per movie rented. What is a possible domain that shows the cost to a member of renting movies?" The correct answer is "The domain is all integers 0 or greater."This is because the equation that models the cost to a member of renting movies is given by y = 10 + 1.5x, where x is the number of movies rented.The domain of a function are the value the independent variable can take, in this case, the values x can take.Each member of the movie rental store has an option of renting from 0, 1, 2, 3, . . . number of movies.

Answer:

B) The domain is all integers 0 or greater.

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