Mathematics, 23.10.2019 03:50 lyndah15
Polymer composite materials have gained popularity because they have high strength to weight ratios and are relatively easy and inexpensive to manufacture. however, their nondegradable nature has prompted development of environmentally friendly composites using natural materials. an article reported that for a sample of 10 specimens with 2% fiber content, the sample mean tensile strength (mpa) was 51.9 and the sample standard deviation was 1.2. suppose the true average strength for 0% fibers (pure cellulose) is known to be 48 mpa. does the data provide compelling evidence for concluding that true average strength for the wsf/cellulose composite exceeds this value? (use α = 0.05.)
Answers: 3
Mathematics, 21.06.2019 13:00
∆abc is reflected across the x-axis and translated 2 units up to give the image ∆a'b'c' with coordinates a'(1, 1), b'(2, -1), c'(2, 1). what are the coordinates of the preimage ∆abc? a. a(-1, 1), b(-2, 3), c(-2, 1) b. a(1, 1), b(2, 3), c(2, 1) c. a(1, -3), b(2, -1), c(2, -3) d. a(1, -3), b(2, -5), c(2, -3)
Answers: 2
Mathematics, 21.06.2019 16:30
Jorge planted flowers in his garden he planted one row of 12 tulips and one row of 36 daisies george's friend kylie has a garden with 75 flowers in it kylie's garden only contains tulips and daisies. is it possible for kylie‘s garden she have the same ratio of tulips to daisies as george's garden?
Answers: 1
Mathematics, 21.06.2019 19:30
Liz had 140 pens and inna had 100 pens. after inna gave liz some pens, liz had 3 times as many pens as inna. how many pens did inna give liz?
Answers: 2
Polymer composite materials have gained popularity because they have high strength to weight ratios...
Mathematics, 06.05.2020 03:11
Geography, 06.05.2020 03:11
Biology, 06.05.2020 03:11
Mathematics, 06.05.2020 03:11
Chemistry, 06.05.2020 03:11
History, 06.05.2020 03:11
Mathematics, 06.05.2020 03:11
Mathematics, 06.05.2020 03:11