Which of the following statements about modeling are true? Group of answer choices A model is a simplified representation of reality. The most useful biological models pack in as much detail as possible. It is possible to make a model without making any assumptions. To make a model, we first need to pick state variables to focus on.

answer: 48

just remember to use pemdas:

parentheses

expressions

multiplication

division

addition

subtraction

a) 7x=7

step-by-step explanation:

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet