Answer:
1,890
Step-by-step explanation:
Because QRST is a rectangle, that means all of the angles must be a right angle, which are 90 degrees. Using this information, solve the expression by creating an equation that lets angle S = 90.
90 = 7x + 55
35 = 7x
x = 5
Block Y has the smallest acceleration
3.1 (it is the tenth place)