How much water must be evaporated from 32 ounces of a 5% salt solution to make a 8% salt solution?
How many yards of material from a 24-yard length of cloth remain after 3 pieces, each 3 yards long, and 5 pieces, each 2 yards long, are removed? A. 2 1/4 B. 4 1/4 C. 4 5/6 D. 10 1/4 E. 10 5/6 So confused.Help me.Please && Thanks
How many quarts of pure sulphuric acid should be added to 5 quarts of water to obtain a 40% solution?
Hi, I need help on my summer assignment, i did all of them except two...which i don't know how to do. I'm so sorry, they have parts to them. The first one is : "A Glass mirror is selling mirrors with frames. The store charges 10 cents for each square inch of mirror and 25 cents for each linear inch of frame. A. Show that a 20 inch by 30 inch mirror should cost 85 dollars (I tried solving this by multiplying the money by the inches, and by finding the area and stuff but either it equals more or less.) B. If there was a mirror that measures 40 inches on one side, what would the other measurement be if the price were still 85 dollars C. Write an equation that determines the price (p) given length (l) and width (W) D. Solve this equation for L" If you could just do A and B that would be great because then i could figure out c and D since u will show me the work and how u did it so I know....Thank You soooo much~!
A large marketing firm will select 4 employees from a list of 8 to represent the company at a regional conference. How many combinations of employees are possible?
A survey of 900 Amercians found that 680 had confidence in the economy. If 80% of the women and 70% of the men surveyed expressed confidence in the economy, then how many women were surveyed?
A bag contains five red balls, three white balls and two green balls. If three balls are selected at random, with replacement, find the probability that the first two are red and third one is green.
Find the accumulated amount A if the principal P is invested at the interest rate of r/year for t yr. (Round your answer to the nearest cent.) P = $1000, r = 4%, t = 9.5, compounded semiannually A = $
The director of the Glen Island Zoo wants to use 170m of fencing to enclose a petting area of 1750m squared. Find the dimensions of the petting zoo.
When a person falls through the ice on a lake, the cold water removes body temperature 25 times faster that air at the same temperature. To survive, a person has between 30 to 90 seconds to get out of the water. How long could a person remain in air at the same temperature?
In 2001 the U.S. population was approximately 285,000,000 people; North Carolina acounted for approximately 2.85% of the total. If 12% of North carolinas population was 65 years or older, how many people in North carolina were in this age group?
The ages of two brothers are in the ratio two to three, but in eight years, the ratio of their ages will be three to four. What is the age of the older brother?
a survey of 400 people found that 66 were left-handed. What percent of those surveyed were left-handed?
The following table shows deaths due to tuberculosis (TB) in two towns. Complete parts (a) through (c). Town 1 Population TB Deaths Whites: 4,656,000 - 8200 Nonwhites: 97,000 - 700 Total: 4,753,000 - 8900 Town 2 Population TB Deaths Whites: 84,000 - 130 Nonwhites: 47,000 - 160 Total: 131,000 - 290 a. Compute the death rates for whites in Town 1. __% (Round to the nearest hundredth as needed). Compute the death reates for nonwhites in Town 1. __% (Round to the nearest hundredth as needed). Compute the death rates for all residents in Town 1. __% (Round to the nearest hundredth as needed). b. Compute the death rates for whites in Town 2. ___% (Round to the nearest hundredth as needed). Compute the death rates for nonwhites in Town 2. ___% (Round to the nearest hundredth as needed). Compute the death rates for all residents in Town 2. ___% (Round to the nearest hundredth as needed). c. Explain why this is an example of Simpson's paradox and explain how the paradox arises. Choose the correct answer below. (a) The rates for both whites and nonwhites was higher in Town 1 than Town 2, yet, the overall rate was higher in Town 2 than in Town 1. The percentage of nonwhites was significantly lower in Town 2 than in Town 1. (b) The rates for non whites was higher in Town 1 than in Town 2, yet, the overall rate was higher in Town 2 than in Town 1. The total number of people was significantly higher in Town 1 than in Town 2. (c) The rates for whites was higher in Town 1 than in Town 2, as the rate for nonwhites was higher in Town 1 than in Town 2. The percentage of whites was significantly higher in Town 2 than in Town 1.
Ann and Sean, paid $208 for concert tickets. They bought twice as many balcony tickets as floor tickets. Balcony tickets cost $15 each and floor cost $22 each. How many of each type of ticket did they purchase ? I have actually figured out the problem to be 8 balcony and 4 floor. The problem is that work has to be shown in algebraic form and I can't figure out how to set the problem up in algebraic form.
At a particular time, the ratio of the height of an object that is perpendicular to the ground to the length of its shadow is the same for all objects. If a 30-ft tree casts a shadow of 12 ft, how tall is a tree that casts a shadow of 14 ft?
A sales price for a car is $12,590 which is 20% off the original price, what is the original price?
Solve for X in the following proportion:
A leather jacket originally costs $150. If it goes on sale for 1/3 off, how much will the customer save?
How many ways can you state 0.943 or equivalent fraction?