Search 85,380 tutors

Circuit R1 has 7 V, R2 has 13 V... the total voltage is 20 V (a) What is the potential difference across R1??? (b) If 10 A flows out of the battery, what is the current through R1??? (c)...

A block of ice in the form of a cube with sides x cm, melts at the rate of 6.45 cm3 per minute. Find the rate of change of x at the instant when x = 10 cm.

A company manufactures two types of window frames: Timber frames and Composite frame. The time available for some of the key manufacturing stages is limited. At present only 2000 hours of...

One car rental agency charges $0.29 per mile plus a$10 weekly fee. Another rental agency charges \$0.35 per mile with no fee. You need to rent a car for three weeks.    Write te...

A pack of cards has a 10% chance of containing a rare card. You buy 10 packs of cards. What is the probability that you end up with at least 2 rare cards?

Consider the equation z^{11} = (1 + \sqrt{3}\, i). Find the value of z which satisfies this equation and which has the second smallest positive argument \theta, 0 < \theta < 2\pi. Express...

The volume of a sphere is increasing at a constant rate of 19.2 pi cm3s-1. Find the radius of the sphere at the instant when the radius is increasing at a rate of 0.3 cm s-1 .

I take a golf ball.  I design it with exactly one dimple per degree of any proposed circumference.  Many of the various circumferences intersect, which means subtracting 2 degrees...

Consider the equation z^{15} = (1 + \sqrt{3}\, i). Find the value of z which satisfies this equation and which has the second smallest positive argument \theta, 0 < \theta < 2\pi. Express...

1. Write down all derangements of the set {α,b,c,d} and show that the number of derangements is the same as predicted by the recurrence D(n) = (n - 1)(D(n - 2) + D(n - 1)) with initial values...

Members of a student government plan to have a movie night To raise money. The members want to know what type of movie the students at the school prefer. There are 1,250 students At the middle school...

A geologist working for a mining company has collected rock and soil samples to take back to a laboratory for analysis. There are 34 samples, which are packed into a drum. The drum itself weighs 90...

A superhero is rendered powerless when exposed to 55 or more grams of a certain element. A 350 year old rock that originally contained 650 grams of this element was recently stolen from a rock museum...

A person uses a 512 Hz tuning fork to find the first two resonant lengths of a closed air column in a very warm classroom. The first length measured was 17.1 cm and the second resonant length was...