The tax is found by mult. the total purchase by 1.07:
1.07(3)($0.99) = $3.18 (rounded up to the nearest cent)
D.
Where (h, k) is the center of the circle and the radius is squared.
0.00592 ≈ 0.0059 to 4 decimal places.
The number after the fourth decimal place is 2, and this is not up to 5, so we round down.
Answer:
a) 476.16
b) 310.93
c) 542.36
Step-by-step explanation:
Surface area is sum of areas of all faces
a) 3 rectangles and 2 triangles
(9.2×16) + (9.2 × 12.8) + (9.6 × 9.2) + (0.5 × 12.8 × 9.6) + (0.5 × 12.8 × 9.6) = 476.16
b) 2 trapeziums and 4 rectangles
2(0.5×(12.5+9.2)×6) + 2(5.3×6.2) + (9.2×5.3) + (12.5×5.3) = 310.93
c) 2 trapeziums and 4 rectangles
2(0.5×(9+4)×15.2) + (4×7.8) + (9×7.8) + (15.2×7.8) + (16×7.8) = 542.36
