A dietician has two foods with which to prepare a diet containing at least 400 units of calcium, 175 units of iron, and 280 units of vitamin A. The table below gives the units of calcium, iron,
and vitamin A per ounce for the two foods.
Calcium
Iron
Vitamin A
Food I
12
14
10
Food II
20
12
25
Food I costs 35 cents an ounce and Food II costs 42 cents an ounce. What combination of the
two foods gives the diet, meeting the above requirements, of minimum costs?
1​

Campus rentals rents 2 and 3 bedrooms apartments for $700 ans $900 a month respectively. last month they had six vacant apartments and reported $4600 in lost rent. how many of each type of apartment were vacant?

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.

Point r divides in the ratio 1 : 5. if the coordinates of e and f are (4, 8) and (11, 4), respectively, what are the coordinates of r to two decimal places?