Friday
July 25, 2014

Posts by Justina


Total # Posts: 33

chemistry
Thanks!

chemistry
7.00 grams of sugar (C12H22O11) are dissolved in water to make 1 L of solution. What is the concentration of this solution? Answer in units of M

CHM101
hydrogen may not be advantageous as a fuel because.......?

CHEMISTRY
the silvery luster

social 10
i don't know

social 10
i don't know

spanish
Decide whether the sentence is grammatically CORRECT or INCORRECT as written. Podemos ayudar mucho en la casa.

science
A -10 nC charged particle has a velocity v=3i+4j+5k ms-1 as it enters a magnetic field B=10000Tj. Calculate the force vector on the charge. What electric field intensity is required so that the velocity of the charged particle remains constant?

algebra ll
Show the work to solve |2x+5| -1 < 6 and describe the graph of the solution in a complete sentence.

american history Lexington and Concord Essay
idk

Math
What price do farmers get for the peach crops? in the third week of June, a random sample of 40 farming regions gave a sample mean of $6.88 per basket. assume that the standard deviation is known to be $1.92 per basket. find a 90% confidence interval for the population mean pr...

Math
When using the student's t distribution to test mu, what value do you use for the degrees of freedom if the sample size is 42? a. 41 b. Can not be determined from information given. c. 43 d. 42

Statstics
Let x be a random variable representing dividend yield of Australian bank stocks. We may assume that x has a normal distribution with \alpha =2.3% A random sample of 18 Australian bank stocks has a sample mean of x bar = 6.1%. For the entire Australian stock market, the mean d...

Statistics
A severe storm has an average peak wave height of 16.4 feet for waves hitting the shore. Suppose that a storm is in progress with a severe storm class rating. Let us say that we want to set up a statistical test to see if the wave action (i.e., height) is dying down or getting...

Math
Records show that 29% of all payments to a mail-order company are submitted after the due date. Suppose 50 payments are submitted this week. Let r be a random variable that represents the number of payments that are late. Use the normal approximation to the binomial to estimat...

Math
The lifetime of a SuperTough AAA battery is normally distributed with mean of 28.5 hours and standard deviation of 5.3 hours. For a battery selected at random, what is the probability that the lifetime will be 25 hours or less? a. 0.7454 b. 0.6604 c. 0.2546 d. 0.3396

math
If i put 2,500 in a bank account with 6.5% interest rate 12 years ago,how much will be in the account now?

home economics
STATE AND EXPLAIN THE BRANCHES OF HOME ECONOMICS.

Science
What are black holes ?

1st grade
I think circle

5th grade MATH
SOLVE THIS EQUATION 3N+2=? n is 2

math
1010

SOCIAL STUDIES
For years, many history books claimed that “Columbus discovered America.” Why do you think Native Americans disagree with the word “ discovered” in this statement? What might be a better word?

Literature- Antigone dialogue
Very nice and I could visualize everything you said I would give you either a B+ or an A

us history
how did juan ponce de leon treat the native americans? please be very detailed. thnx in advance

government
what were the two levels of goverment in New york in the late 1760's ?

4th grade social studies
What were the 2 levels of goverment in New York in the late 1760's ?

8th grade
Why the Virginia Plan wasn't a suitable solution to the problem of representation?

math(Please help!!!)
Ha you must be grade 8 cause I got it my text book oh in back it says 4 m

math(Please help!!!)
Ha you must be grade 8 cause I got it my text book oh in back it says 4 m

11th grade physics
does a person that is moving very fast have to be accelerating?

Probability problems
1. a) 0.02*0.02= 0.04 b) 1-0.04= 0.06 c) 0.02*0.08= 0.0016

math!
How do you findout which group contains fractions that are equivalent to one fourth? My choses are A two eights, four twentyths, eleven fourty four, B three sixth, twenty eights, three twevlth, C six twenty four, fifteen sixty, fifty two hundred, and D three twelve, twenty fiv...

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