Ultrasound is a cyclic sound pressure wave with a frequency greater than the upper limit of the human hearing range. Ultrasound is thus not separated from "normal" (audible) sound based on differences in physical properties, only the fact that humans cannot hear it.
(? + 11.86) X 14.89 = 19.89% of 2399.89
4999.99 ÷ 10.25 + 379.99 - 160.25 = ?
157.78% of 4820 + 92.33% of 2840 = ? + 115.55% of 1980
25.04 × 22.03 + 383.92 ÷ ? + 23.78% of 1499.98 = 926.08
(22.9)3 + (30.021)² - (19.11)3 - (44.98)² = ?
40.93√? + √6625 + √6920 + √? = 205.7542`xx` 7.654
124.88% of 60.101 + 18.09% of 849.87 – 22.12% of 1049.93= ? – 19.93
(24.78 × 11.67) + (7199.67 ÷ 14.99) = ? × 12.65
(115.25 + 324.78) ÷ 4.99 = ?2 – 56.44
[(2/3 of 899.79) + 25% of 500.21] × (√195.77 + 30.03% of 399.79) = ?
