Four missiles are fired at a target. if the probabilities of hitting the target are 0.3, 0.4, 0.5 and 0.6 respectively and if the missiles are fired independently then what will be the probability. i)that all the missiles hit the target? . ii)that at least one of the four hits the target? . iii)that exactly one hits the target? . iv)that exactly 2 hit the target? .
the quadratic formula is , where a, b, and c are values in the quadratic ax^2 + bx + c. plug in the values to get
36 cm is the final : )
longer - 20 in and shorter - 12 in
we know that when we subtract the shorter side from longer we get two cuts named x:
2 x = a - b => a - b = 2 x
one of this section ( x ) with height ( h ) and lateral (congruent non parallel) side ( c ) make right triangle, from which we get:
x² = c² - h² and c = 5 in, h = 3 in
x² = 5² - 3² = 25 - 9 = 16 => x = √16 = 4 => x = 4 in
now we will replace x = 4 in the equation a - b = 2 · 4 = 8 and get first equation of the system.
a - b = 8
we also know that the formula for calculating perimeter is:
p = a + b + 2 c where p = 42 in and c = 5 in
a + b = 42 - 2 · 5 = 42 - 10 = 32
now we get the second equation of the system:
a + b = 32
a - b = 8
when we add first equation to the second we get:
2 a = 40 => a = 40 / 2 = 20 => a = 20 in
when we replace a = 20 in the first equation we get:
20 + b = 32 => b = 32 - 20 = 12 => b = 12 in
god with !