Tuesday
December 10, 2013

# Posts by joel

Total # Posts: 240

Statistics
The null hypothesis,H0:u=48,was tested against the alternative hypothesis,H1:u>48.A sample of 75 resulted in a calculated p-value of 0.102.if standard deviation=3.5,the value of the sample mean is?need help

Statistics
The amount of fill(weight of contents)put into a glass jar of spaghetti sauce is normally distributed with mean=850g and standard deviation=8g.the probability that a random sample of 24 jars has a mean weight greater than 848g is?need help

Statistics
Of 100 people who were given a vaccine,80 developed immunity to a disease.the 98% interval on the proportion of people developing immunity is?need help

Chemistry
What is a photon? Several selections may be correct. Has an energy of equal to hν. Is a unit of electromagnetic radiation. Is a part of the electromagnetic spectrum. Is usually called visible light. None of these.

Chemistry
a 23ml H2SO4 solution is titrated by 50 ml 0.10 M NaOH solution, what is the molarity of H2SO4 solution? (Note that H2SO4 is a diprotic acid)

Maths literacy
Write 78/115 as a decimal fraction

algebra
Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. -7x – 5y = 1.5 -5x – 4y = 4.5

algebra
Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. -x – 8y = 43 4x + 32y = 172

algebra
A dehydrated patient needs a 3.82% saline IV. Unfortunately, the hospital only has bags of 4% and 3% saline solutions. How many liters of each of these solutions should be mixed together to yield 5 liters of the desired concentration?

algebra
To buy both a new car and a new house, Tina sought two loans totalling \$319,531. The simple interest rate on the first loan was 2.7%, while the simple interest rate on the second loan was 2.6%. At the end of the first year, Tina paid a combined interest payment of \$8334.15. Wh...

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