Xis a number from the set [3,5,6] and y is a number from the set [4,7,8,9]. if xz/y is an integer and z is a positive integer, what is the lowest possible value of z? a) 1 b) 2 c) 3 d) 4 plzz !

The smallest possible value of z is the denominator of the reduced fraction x/y. We note the prime factors of the members of set y are

... 2², 7, 2³, 3²

so if there are any even members of set x, the fraction can be reduced to something divided by 2. The number 6 in set x is even, so we have

... 6z/4 = 6·2/4 = 3 (an integer) when z=2

The lowest possible value of z is ...

... B) 2

plants store their excess carbohydrate in the form of starch so that it could be used as energy source later on. the excess carbohydrate is converted into starch in the plastid i.e. chloroplast & this process occurs in the presence of sunlight. it is an insoluble polymer of glucose which gets stored in cell organelles named as amyloplasts. in some plants, starch is also stored in roots and embryos.

i believe your answer is 99.7% of 7-year-old children are between 46.6 inches and 49.5 inches tall.