123. On an averageof the food eaten is turned into organism's own body and is available for the10nextlevel of consumer in a food chain. What fraction of the food eaten is not available for thenext level?24. The food we eat remains in the stomach for a maximum of 4 hours. For what fraction of a day,does it remain there?25. It was estimated that because of people switching to Metro trains, about 33000 tonnes of CNG,3300 tonnes of diesel and 21000 tonnes of petrol was saved by the end of year 2007. Find thefraction of : (i) the quantity of diesel saved to the quantity of petrol saved. (ii) the quantity ofdiesel saved to the quantity of CNG saved.26. A cup isfull of milk. What part of the cup is still to be filled by milk to make it full?

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College Algebra

1st Edition

ISBN:9781938168383

Author:Jay Abramson

Publisher:Jay Abramson

Chapter7: Systems Of Equations And Inequalities

Section7.2: Systems Of Linear Equations: Three Variables

Problem 66SE: The top three countries in oil production in the same year are Saudi Arabia, the United States, and...

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The top three countries in oil production in the same year are Saudi Arabia, the United States, and Russia. In millions of barrels per day, the top three countries produced 31.4% of the world's produced oil. Saudi Arabia and the United States combined for 22.1% of the world's production, and Saudi Arabia produced 2% more oil than Russia. What percent of the world oil production did Saudi Arabia, the United States, and Russia produce?[28]
A vat contains 4000 litres of wine with an alcohol content of 10%. How much of this wine must beremoved so that, when it is replaced by a wine with an alcohol content of 17%, the alcohol content in thefinal mixture will be 12%?
(a) The service elevator at AR Hector Financial Complex has a maximum capacity of 2870 lbs.If the elevator operator weighs 205 lbs and has to move hundreds of boxes from the ground floor tothe Penthouse, if each box weighs 65 lbs, what is the maximum number of boxes that can besafely conveyed on the elevator on each trip? (b) The borough of Pan Sherzando charges homeowners $75.24 per month plus $3.86 per1000 litres for water usage in excess of 10,000 litres. In 2019 one homeowner’s monthlybill ranged from $137.00 to $245.08. Find the range for the water used by that homeowner.
2. How many gallons of a plant food that is 9% nitrogen must be combined with smother plant food that is 25% nitrogen to make 10 ya of a plant food that is 15% nitrogen?
From a crushed quartz sample, the fraction less than 5mm must be removed by screening. The feed sample contains 30% of minus 5mm material. After screening, the oversize fraction contained 85% of plus 5mm size while the undersize fraction contained 12% of plus 5mm. Determine the efficiency of the screen.
1. if you mix 10lbs of peanuts costing $1.50 per pound with cashews costing $2.50 per pound, how many pounds of cashews would you need to add so that the resulting mixture has a cost per pound of $1.95? 2. , if you mix 10 liters of pure water with 15 liters of a 30% alcohol solution, what is the concentration of the resulting mixture?
(a) The service elevator at AR Hector Financial Complex has a maximum capacity of 2870 lbs. If the elevator operator weighs 205 lbs and has to move hundreds of boxes from the ground floor to the Penthouse, if each box weighs 65 lbs, what is the maximum number of boxes that can be safely conveyed on the elevator on each trip? The borough of Pan Sherzando charges homeowners $75.24 per month plus $3.86 per 1000 litres for water usage in excess of 10,000 litres. In 2019 one homeowner’s monthly bill ranged from $137.00 to $245.08. Find the range for the water used by that homeowner. A contractor has to build rectangular pool 12 metres long and 8 metres wide. The pool must, by agreement, contain a rectangular border of uniform width and must be exactly 120 sq meters in area. How wide should the border be? Round to the nearest tenth of a metre. If physical planning laws require at least a 2-metre-wide border around a pool, would the contractor be able to satify both the…
A commercial cherry grower estimates from past records that if 21 trees are planted per acre, then each tree will yield an average of 33 pounds of cherries per season. If, for each additional tree planted per acre (up to 24 additional trees), the average yield per tree is reduced by 1 pound, how many trees should be planted per acre to obtain the maximum yield per acre? What is the maximum yield? Question content area bottomIn order to get the highest yield of....pounds, ..... trees should be planted per acre.
A homeowner must reduce the use of his home electricity. the home currently consumes 25.7 kwh of electricity per day, and the homeowner must reduce the use by 20%. find the amount of electricity that will be used after the reduction in two different ways, using two different scale factors
The weekly total cost incurred by Windies Cricket for producing q jerseys is: ?(?) = 38? − 0.02?2 + 30,000 If Windies Cricket wishes to maintain a total cost less than $42,000.00, what range(s) of Windies jerseys should be produced. Show working
Suppose the man who weighs 120 pounds can drink 3 1/4 pints of beer per hour and still remain legally sober. How many pints of beer could a 156-pound man consume per hour under similar circumstances and still remain sober?
Calculate the amount of rice bran (12.5% CP), corn (8.5% CP), soybean meal (49% CP) and copra meal (20% CP) in formulating 300 kg diet with 19% CP. Assume that the energy mixture will have a ratio of 2:1 and protein ingredients proportion is 1:3.

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