a=(πd^2)/4, we are told d=8.4 so
a≈55.42 m^2 (to nearest hundredth of a square meter)
C=πd, again d=8.4m so
C≈26.39 m (to nearest hundredth of a meter)
The answer (depending on how you teacher wants it) is either 8.4or 26.39.
You teacher most likely wants to see 26.39 as the diameter
The area can be found by squaring the radius and multiplying it by pi.
The radius is 4.2, so...
The area is 55.39
its 60-10+x why, because she bought the dress with $60 and she received $10 dollars back. We don't know the variable.
Answers:k = 13The smallest zero or root is x = -10
note: you can write "x^2" to mean "x squared"
f(x) = x^2+3x-10
f(x+5) = (x+5)^2+3(x+5)-10 ... replace every x with x+5
f(x+5) = (x^2+10x+25)+3(x+5)-10
f(x+5) = x^2+10x+25+3x+15-10
f(x+5) = x^2+13x+30
Compare this with x^2+kx+30 and we see that k = 13
Factor and solve the equation below
x^2+13x+30 = 0
(x+10)(x+3) = 0
x+10 = 0 or x+3 = 0
x = -10 or x = -3
The smallest zero is x = -10 as its the left-most value on a number line.