In elementary school (grades 1 to 6), there is a strong association between a child’s height and the child’s reading ability. taller children tend to be able to read at a higher level. however, there is a very significant confounding variable that is influencing both height and reading ability. what is it?

Age level and grade level. Because usually the taller children are older and in a higher grade level.

d) 30 units^2

area of rectangle = l × b

we know,

length = 10 unit

breadth = 3 unit

applying the formula,

= l × b

= 10 × 3

= 30 unit^2

happy to

pls mark as brainliest

the correct answer is you spend $55.78 more in a brand store that buy ing in a normal store.

step-by-step explanation:

brand = spend   $ 135.85 total

store = spend $80.07 total