This is very !

1. multiply 7/5 and -5/4 answer as an improper fraction in simplest form

2. multiply -2 1/2 and -3 1/3

3. divide -24 and 7 answer as a mixed number in simplest form

4. over 25.5 days, a pond's water level changed by an average of −0.32−0.32 centimeter each day.
what was the total change in the water level?

5. multiply -1.2 and 0.4

6. timothy recorded the monthly change in his savings account balance, in dollars, for 8 months.
month- january february march april may june july august

dollars- −30 −15 55 40 −20 −45 −10 65
what is timothy's average monthly savings account balance?

7. divide -3/8 and -6/7

8. jerry measured and timed the descent of a diving bell spider in a large fish tank. the spider reached a position 4 1/2 inches below the surface of the water after descending at a constant rate for 1 1/2 seconds. jerry recorded this as −4 1/2 inches.
what is the position of the spider relative to the surface after 1 second?

9. divide 5 1/4 and -2 1/2 answer it as a mixed number in simplest form

10. miko’s restaurant bill was $16. she used the expression 1.18(16) to find the total cost including an 18% tip.

what expression is equivalent to the amount miko paid?

a) 16 + 1.18
b) 1 + 1.18(16)
c) (16 + 0.18)16
d) 16 + 0.18(16)

if you get 2 or less wrong then i will give you brainliest. you will get 25 points. answer in the next 10 !

Overproduction of uric acid in the body can be an indication of cell breakdown. this may be an advance indication of illness such as gout, leukemia, or lymphoma.† over a period of months, an adult male patient has taken nine blood tests for uric acid. the mean concentration was x = 5.35 mg/dl. the distribution of uric acid in healthy adult males can be assumed to be normal, with σ = 1.87 mg/dl. (a) find a 95% confidence interval for the population mean concentration of uric acid in this patient's blood. what is the margin of error? (round your answers to two decimal places.) lower limit upper limit margin of error (b) what conditions are necessary for your calculations? (select all that apply.) σ is unknown n is large σ is known normal distribution of uric acid uniform distribution of uric acid (c) interpret your results in the context of this problem. there is not enough information to make an interpretation. the probability that this interval contains the true average uric acid level for this patient is 0.05. the probability that this interval contains the true average uric acid level for this patient is 0.95. there is a 95% chance that the confidence interval is one of the intervals containing the population average uric acid level for this patient. there is a 5% chance that the confidence interval is one of the intervals containing the population average uric acid level for this patient. (d) find the sample size necessary for a 95% confidence level with maximal margin of error e = 1.10 for the mean concentration of uric acid in this patient's blood. (round your answer up to the nearest whole number.) blood tests