Answer:
7.065 about
Step-by-step explanation:
Area= 3.14 r squared r=3/2
3.14 x 1.5 squared=7.065
(x+1)^2-x^2=23
x^2+2x+1-x^2=23
2x+1=23
2x=22
x=11
11^2 = 121
x+1 =12
12^2=144
144-121 = 23
obtuse angle
1.01 × 10⁴ - scientific notation
10,100 - decimal notation