HI how are you doing?

Achange in any of the following factors will cause investment spending and aggregate demand to change excepta. the interest rate effect b. expected business conditionsc. real interest rate d. expected future returns created by new technology e. expected business taxes

Idon’t understand 8. plz ! we are finding the area of polygons. thx in advance!

  usually, loads of more than pounds require the assistance of a second person.           a. 40   b. 20   c. 50   d. 30