# 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**

2y/3+27+3y/4=-24 Please help me solve and show your work please and thank you

**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 ...