# Posts by Melvin

Total # Posts: 51

Statistics
The amount of time the university professors devote to their jobs per week is normally dis- tributed with a mean of 52 hours and a standard deviation of 8 hours. (a) What is the probability that a professor works for more than 56 hours per week? (b) Find the probability that ...

Government
Amy is right guys i took OCA's answers and got an 80... Listen to amy... wel 5 is actually A for me but i think the schools are doing that on purpose for this exact reason Haha

math
the angle of elevation of the top of a radio mast from a point 53m from its base on level ground is 61degre. Find the height of the mast to the nearest 5m.

science
An incident Ray makes 60 degrees angle with the surface of the plane mirror, what is the angle of refraction. Options are...a 60 b 90 c 30 d 0....this is a question in a guide is it correct

prepositional calculus
my problem has nothing to do with assigning truth values though I have to rewrite it in conductive normal form

prepositional calculus
you did not misunderstand the ≡ operator

prepositional calculus
Convert the following formula to conjunctive normal form (clause form). a) a ≡ (b ≡ c) is the answer (a כ(( b כ c) ^ (c כ b))) ^ ((( b כ c) ^ (c כ b)) כ a) unsure thanks

logic
Convert the following formula to conjunctive normal form (clause form). a) a ≡ (b ≡ c) is the answer (a כ(( b כ c) ^ (c כ b))) ^ ((( b כ c) ^ (c כ b)) כ a) unsure thanks

Physical Science
A model electric train requires 12 V to operate. When connected to a household voltage of 120 V, a transformer is needed. If the primary coil has 500 turns, how many turns must the secondary coil have?

Physics
30

math
a group of 3 friends shared the cost of a tape recorder. if andy, barbara, and donna each paid \$12, \$30 and \$18, respectively, then donna paid what percent of the cost of the tape recorder?

algebra
a bug crawls clockwise around the outside rim of a clock from 12 to 4 and travels 7 inches. if a second bug crawls around the outside rim from 6 to 11, in the same direction, how many inches did the bug crawl?

algebra
jake and jessie are standing next to each other in the sun. if jake's shadow is 48 inches long, and he is 72 inches tall, how long is jessie's shadow, in inches, if she is 66 inches tall?

algebra
\$27.00

math
what is the ratio from girl to boy and the bus is 20/15

math
The ratio of boys to girls on the bus is 20/15

math
how did you get four? I followed you up till 4.9. What did you divide in order to get 4?

health
An example of a depression screening tool includes the ? A. Patient health Questionnaire B. Center for Epidemiologic Studies Depression scale C. Geriatric Depression Scale D. All od the above

Math
if a 6 foot man casts an 8 foot shadow what is the height of the building that casts a 72 foot shadow

analytic
what is the answer of this?the line segment connecting (x,6)and (9,y) is bisected by the point (7,3) find the values of x and y

Principles of finance
Faulkner’s Fine Fries Inc (FFF) is thinking about reducing its debt burden. Given the following capital structure information and an expected EBIT of \$50 Million (plus or minus 10%) next year, should FFF change their capital structure? FAULKNER'S FINE FRIES INC. (FFF...

Science
A car of mass m travelling at 20 m/s east on a straight level road and a truck of mass 2m travelling at 20 m/s west on the same road. What is the velocity of the car relative to the truck?

statistics
The general manager for Gordon's Self Service Gasoline is interested in estimating the mean number of gallons of gasoline that are purchased by customers at their Philadelphia location. He would like his estimate to be within plus or minus 0.50 gallons, and he would like ...

Math

math
help! If you have an equilateral triangle with a line down the middle from top to bottom with T at the top and R X S at the bottom, X being in the middle and RT=6, RS=9 then RX= what?

Statistics
This is my first stats class and I don't know how to do this, could you please help me? Thank you. You are asked to determine the typical number of sales of a certain product at the store you work for. A sample of 50 days over the last quarter shows an average of 55 units ...

AP Physics
Light passes from air into water at an angle of incidence of 33.5.degrees Find the angle of refraction in the water. Answer in units of degrees

Chemistry
no not unless the teacher says your not allowed too

math
Adding mixed numbers so its the same denominator: 3 5/8 + 12 1/6

math
employees worked 200 regular hours and 50 hours of overtime. what percent of the total hours for the week were overtime?

Algebra
Thanks Henry and bobpursley for replying. Now the question makes sense :-)

Algebra
The formula T=2π√L/480 can be used to find the period (T in seconds, the time it takes a pendulum to complete one cycle) of a pendulum that is L cm long. (a)Rewrite this formula using rational exponents. Don't forget to rationalize the denominator. (b)Solve the ...

Statictics
What is the probability of tossing a number divisible by two, and the probability of tossing a prime number of a "Fair Die"?

writing
Compare and contrast your abilities as an academic writer now as opposed to when you began your studies at the University of Phoenix. Using four comparatives and four superlatives within your responses, explain what has led to these changes and what changes you will make in ...

Math
I am 55, my motherlaw is 70, my friend is 40. How do I figure out the LCM and the GCF. My home assignment is listed as= List the ages of two people in your life, one older than you and one younger than you. It would be best if the younger person was 15 years of age or younger...

math
I am 55 years old (Melvin) and I am supposed to list the ages of two people in your life which is my mother in law(Saraha) whom is 70 years old is the one older than me and one younger than me is my friend (Peter), he is 40 years old. I am supposed to find the prime ...

math
List the ages of two people in your life, one older than you and one younger than you. It would be best if the younger person was 15 years of age or younger. Find the prime factorizations of your age and the other two persons’ ages. Show your work listed by name and age. ...

Public Finance
A worker lives in a state that has its own income tax. The worker is in the 31 percent federal tax bracket. In addition, he is subject to a 9 percent MTR for his state income tax. Assume that mortgage interest is deductible both on his federal and state income tax, and that ...

Math
The vector a1=(1,1,0) and a2=(1,1,1) span plane in R^3. Find the projection matrix P onto the plane, and find nonzero vector b that is projected to zero.

science
Whose responsibility is it to reduce our impacts on climate?

Math
show that the length of Ax equals the length of A^T x if AA^T=A^T A

algebra
An equivalent expression of h+zx

PHYSICS
A steam turbine operates between hot and cold reservoir temperatures of 538.0 ¢XC and 92.1 ¢XC, respectively. If heat is supplied at a rate of 238.0 MW, what maximum amount of power could the turbine deliver?

math
A ladder 9.00 m long leans against the side of a building. If the ladder is inclined at an angle of 75.0° to the horizontal, what is the horizontal distance from the bottom of the ladder to the building?

organic.chem
Since you can't draw the structures, could you just give me the name of X and I will draw the structure.Thanks!

organic.chem
Compound X, C8H17Cl, is a chiral product of the radical chlorination of 4-methylheptane. X reacts in SN2 fashion with NaI in acetone to form Z, C8H17I. When the reactant is the R-enantiomer of X, only the R-enantiomer of Z is formed. What is the structural formula for X?

georaphy
all the countriies we studied in this chapter gained independence from the soviet union

history
What do the Stars on the U.S. Flag mean.

history
Without our two great political parties cutting across economic and geographic interests.Democracy as we know it could never have been made to function. The author of this statement probably meant to suggest that

algebra
How do you solve 1/125=25^6x-5 please and thank you I read this as 1/125 = 256x-5 or 5-3=256x-5 Take the log base five of each side.. -3=2(6x-5) solve for x. What exactly do you mean by take the log base five of each side?

english
Hi. I know this might be kind of a stupid question, but I was wondering if a predecessor follows something or is before it? I thought it was after, but the dictionary definition makes it seem like it is before. Is it before because of the pre? Thank you for using the Jiskha ...