A metallurgist has one alloy containing 21% titanium and another containing 58% titanium. How many pounds of each alloy must he use to make 49 pounds of a third alloy containing 53% titanium? (Round to two decimal places if necessary.)

if brenda spent 3/4 at work for 4 days . how many hours did she spend

A welder has 10 1/4 ft of 1/2 inch pipe. How many pieces of pipe, each of length 1 3/4 ft, can be obtained from the original pipe if each cut removes 1/16 inch of pipe?  (Enter a whole number of pieces.)    How long is the remaining piece of pipe (in inches)? (Enter your answer as a simplified mixed number.)

How many ounces of 10% alcohol would need to be mixed with pure rubbing alcohol to get 16 ounces of a 14% alcohol mix?

A bleach disinfecting solution is mixed at a 3:5 ratio (bleach to water). If the solution has 750 mL of distilled water, how many milliliters of bleach is required? Round your final answer to 1 decimal place if necessary.

Deandra is doing her math homework. Out of 24 problems total, she completed the first 12 problems in 1 hour and the last 12 problems in 3 hours. What is the unit rate for all 24 problems?

If 27.2 gallons of fuel are used to drive 435 miles, how many gallons are needed to drive 1,680 miles? Carry the answer to one decimal place.

You have a creamed spinach recipe that produces thirty 5-oz. servings.  Your catering company will be serving 175 guests each a 3.5 oz. serving.  Calculate the recipe conversion factor. (round your answer to 4 decimal places)

After moving into a new house, a couple wants to have a concrete patio poured to support a hot tub, because... well, because it's a hot tub. The plans call for a 9 ft by 17 ft slab of concrete 6 inches thick. How many cubic feet of concrete wil be needed? Round to two decimal places if necessary. Rounding to two decimal places if necessary, they will need concrete. (Choose one) ▼ of X 5 181.

If 81% of an aspirin remains in the bloodstream after 4.0 hours, how long after a 75 mg aspirin is taken does it take for there to be 32 mg in the bloodstream? hours. There will be 32 mg in the bloodstream after (Round to the nearest whole number as needed.)