subject
Mathematics, 28.09.2019 20:30 asapocean0317

Certain types of bacteria in water are harmful to marine life. to determine how to eliminate two different types of harmful bacteria found in the local waterways, a marine biologist is going to test three different treatments using a control group. why should the biologist use a block design?
a. to account for unknown variables
b. there are different types of marine life in the water
c. the different types of bacteria may respond differently to the treatments
d. the treatments may also harm good bacteria

ansver
Answers: 1

Another question on Mathematics

question
Mathematics, 21.06.2019 14:00
Carson has only $20 bills and $10 bill in her wallet. the total value of the bills is $50. she has 1 more $20 bill than $10 bills. how many each kind of bill does carson have? a. one $20 and two $10 bills b. two $20 bills and one $10 bill c. one $20 bills and three $10 bills d. two $20 bills and two $10 bills
Answers: 2
question
Mathematics, 21.06.2019 19:10
If $740 is invested at an interest rate of 11% per year and is compounded continuously, how much will the investment be worth in 7 years? use the continuous compound interest formula a = pert.
Answers: 1
question
Mathematics, 22.06.2019 00:00
City l has a temperature of −3 °f. city m has a temperature of −7 °f. use the number line shown to answer the questions: number line from negative 8 to positive 8 in increments of 1 is shown. part a: write an inequality to compare the temperatures of the two cities. (3 points) part b: explain what the inequality means in relation to the positions of these numbers on the number line. (4 points) part c: use the number line to explain which city is warmer. (3 points)
Answers: 2
question
Mathematics, 22.06.2019 00:30
If it 8 inch candle burns at 7/10 inch per hour and a 6 inch candle burns at 1/5 inch per hour after how many hours would both candles be the same height
Answers: 1
You know the right answer?
Certain types of bacteria in water are harmful to marine life. to determine how to eliminate two dif...
Questions
question
English, 30.08.2019 14:20
Questions on the website: 13722361