3. Kira is 7 inches shorter than her brother. If her brother is t inches tall, which expression could represent Kira's height? *
A. t + 7
B. t-7
C. 7-t
D. t - (t + 7)

B

Step-by-step explanation:

Kira is 7 inches shorter than her brother or 7 inches less. Less is a keyword for subtraction. She is 7 inches less than t. So t-7 means 7 less than t inches tall.

step-by-step explanation:

there is a formula i can give you:

it is r^2*n*sin(360/n) divided by 2 where r represents the "radius" and n is the number of sides.

plug them in:

(10sqrt(3))^2*6*sin(360/6) divided by 2

100*3*6*sin(60) divided by 2

900*sin(60)

900*sqrt(3)/2

450*sqrt(3)

approx is 779.4 cm^2

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step-by-step explanation: