What is the interval when written in the form of (lower limit, upper limit)(lower limit, upper limit) ?
45 m±1.5 m
a. (43.5, 46.5)
b. (45, 45.5)
c. (45, 46.5)
d. (43.5, 45)
! i suck at

Arley is building a model of a city map. in one part of the city, three roads form a right triangle, which harley draws as triangle abc, with the following measures: m∠b=90° and m∠a=30°. in his scale model, the hypotenuse of triangle abc, ac¯¯¯¯¯¯¯¯, has a length of 817−−√ cm. what is the value of a (the length of bc¯¯¯¯¯¯¯¯)?

Evaluate the expression for the given value of the variable 7a - 4a for a =8

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