Explanations on how to set it up would be great!

you so so much in

don't reply if you're unsure, i genuinely need ///:

How much dextrose 70% must be mixed with dextrose 5% to prepare 1,000 ml of dextrose 20%?

How many 3/8s are in 6 plz someone tell me now

Titus works at a hotel. part of his job is to keep the complimentary pitcher of water at least half full and always with ice. when he starts his shift, the water level shows 4 gallons, or 128 cups of water. as the shift progresses, he records the level of the water every 10 minutes. after 2 hours, he uses a regression calculator to compute an equation for the decrease in water. his equation is w –0.414t + 129.549, where t is the number of minutes and w is the level of water. according to the equation, after about how many minutes would the water level be less than or equal to 64 cups?