右下角是解答，但我一直算不出來，請幫我解答一下，還有過程

Apply elementary row operations to transform the following matrix first into echelon form and then into reduced echelon form. 64-5 3 -6 3 -7 -7 8-589 3-9 12-96 15 1 0-2 3 0 -24 0 1 -2 2 0 -7 000014 62 62

想問這題怎麼算

28. A trough is 6 m long and its ends have the shape of isos- celes triangles that are 1 m across at the top and have a height of 50 cm. If the trough is being filled with water at a rate of 1.2 m³/min, how fast is the water level rising when the water is 30 centimeters deep? goal: dh dt

請問綠色框起來的是什麼意思

example.o A,B: sets, |A|-|B|=n<∞ A function f : A → B is one to one Proof (F) Suppose 39, #az & fears = fiaz) : 充分必要 if and only if it is onto. 7-1-4 3 | { bib = fca, for a EA & 979, 192}|≤n-2 =|f(A)| = h-1 < |B| 7 f is not onto Proof

這題的解答給的是C, 該怎麼求出，感謝！

6. Find the volume of the solid whose region is the intersection of the cube {(x, y, z) : |x| ≤ 1, |y| ≤ 1, || ≤ 1} and the ball {(x, y, z) = x² + y²+ z² < 2}. 16 (A) 32(√2-1). (B) (8-√2). 3 16 (C) (10- √2)TT. (D) √√2π. 3 32 3

想請問這題的圖應該怎麼畫

PO WWW VI VO 2.33 The diode cut-in voltage is 0.7 V and VB = 1.8 V for the circuit shown in Fig. 5. Plot vo versus v, over the range, <+5 V R = 4 KW VB D 3 Vo •T• 2.33 (a) (1) V₂ =1.8 V For U₁ 21.1V, Vo = V₁ For U, $1.1V, vo = 1.1V 72/7

想請問一下這題怎麼寫？ 感謝各位大神🥺

2. The following table summarizes results from an experiment in which subjects were first classified as smokers or nonsmokers. After these subjects were given a treatment, later they were again classified as smokers or nonsmokers. After-smoker After- non-smoker Before- smoker 40 14 Before- non- smoker 5 80 2-1. How many subjects changed their smoking status after the treatment? 2-2. How many subjects appear to be unaffected by the treatment? 2-3. Using the appropriate frequencies, find the value of the test statistic. 2-4. Using a 0.025 significance level, find the critical value, and make your conclusion. 2-5. Based on the preceding results, do you think this treatment is really benefit to help people quit smoking?

以下是心統的題幹 想請問第c題算出來是6.88是要回答6還是7位？

2. Suppose the average height of all distribution is normal. 假設 students is 165 cm. The standard deviation is 10. The 學生的身高平均為 165 cm,標準差為10,呈現常態分配。

想問這題要怎麼解 只有想到要用左右極限相等

15. Let x cot kx if x < 0 = (2.0) if x ≥ 0 EURCHSHA Find the value of c that will make f continuous at x = 0. FIGURS Glaidw |[ 2.0] to unioqbim srb (7) f(x) Jx L x ² + c =

想問一下這題 因為課本沒有解答也不知道自己算得對不對

16. Chemistry: Wind Chill At 0° Celsius, the heat loss H (in kilocalories per square meter per hour) from a person's body can be modeled by notenui ent to VID N ov x3 ml H = 33(10√v − v + 10.45) where v is the wind speed (in meters per second). dH (a) Find and interpret its meaning in this situation. dv zive (b) Find the instantaneous rates of change of H when v = 2 and v 5. =

請問最後一行為什麼sin inverse 1/2 = 兀/6

Limits and derivatives 21 lim Sin (F THE 14:06 Sin' Clim 1=√x |x Sin' (lim (1-√x)(1+√X) = Sint | x-²), (1-x)(1+√x) lim! XHSX =Sint ASUS VivoBook 1-X JOODU JUUUU JUUUU Pri Sc