Afatigue test was conducted in which the mean stress was 70 mpa, and the stress amplitude was 210 mpa. (a) compute the maximum and minimum stress levels. (b) compute the stress ratio. (c) compute the magnitude of the stress range

Step-by-step explanation:

Given

-------1

-------2

From equation 1 & 2 we get

(b)Stress ratio(R)=

R=

(c)Range=

Range=280-(-140)=560 MPa

total amount to be paid = $19.5

step-by-step explanation:

given ,

original price = $25.99

discount = 25%

discount amount = 25% of original price

discount amount = 25/100   * 25.99

discount amount = $6.49

hence , the total amount to be paid = original price - discount amount

                                                            = $25.99 - $6.49

                                                            =$19.5

total amount to be paid = $19.5

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204