Question: 289 elementary school students and 120 middle school students wrote letters for a time capsule. Estimate the total number of letters written. Steps to derive 1 Round up 289 to the nearest hundred = 3002 Round down 120 to the nearest hundred = 1003 300 + 100 = 4004 So, the estimated number of letters written are about 400.Hence the right answer is Option B Click Here To Go Back Find the solutions of the equation (x + 5)3 = 27, graphically... Solve the equation x2 - x - 19 = 0 using the quadratic formula... Solve the equation x (5x + 9) = 16 using the quadratic formula... Solve the equation 5x2 - 25x - 26 = 0 using the quadratic formula... Solve the equation 6x2 - 27x - 15 = 0 using the quadratic formula... Solve the equation 4x2 - 8x + 3 = 0 using the quadratic formula... Solve the equation 4x2 + 20x - 24 = 0... Solve the equation x2 - 4x + 4 = 0 graphically... Find the solutions of the the equation x2 + 2x + 2 = 0 graphically... Find the solutions of x + 13 = 13213x+170... Find the solutions of x + 19 = x + 7... Find the solutions of |3x - 9| = 30... Find the solutions of 5x2 - 2x + 12 = 6x2 - 6x - 9... Solve: |8x + 80| = 8.. ∠A and ∠B are right angles as shown. Prove : ∠A ≅ ∠B.. ∠A and ∠B are congruent and supplementary. Prove that ∠A and ∠B are right .. l ⊥ m as shown. Prove: ∠1, ∠2, ∠3 and ∠4 are right angles... m ∠AOB = m ∠BOC as shown. Prove : OA↔ ⊥ OB↔.. Write the first step of an indirect proof of the following statement: ∠A is not a rig.. Write the first step of an indirect proof of the following statement: AB↔ and CD&har.. What conclusion follows from the following pair of statements? 1. If two non vertical lin.. AB‾ ⊥ CD‾ as shown. Prove: ∠AOC ≅ ∠BOC.. n ⊥ l, m ⊥ l as shown. Prove: n || m.. b || c, a ⊥ b as shown. Prove: a ⊥ c.. Two non vertical lines l and l ′ with slopes m and m ′ are as shown and ∠A.. ∠1 is complementary to ∠2 as shown. Prove: PQ‾ ⊥ PR‾.. ΔEFG is a right angled triangle as shown. Prove: ∠E and ∠G are complementary.. 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The following table gives the weights in kgs of 5th grade 20 students in a class. Find th.. The table contains information regarding the number of children per family in a certain pl.. If the mean of the data 10, 15, x, 18, 12, 20 is 16, then the value of x is :.. The mean of the following frequency distribution is 18.5. Find the value of t.x1823t1516f.. The mean of the terms (a + b), (b + c) and (c + a) is:.. The sum of 20 observations of a data is 440. Their mean is:.. The median of the observations 15, 30, 11, 25, 18, 20, 23 is:.. The median of the observations 2.3, 1.8, 1.3, 3.5, 2.9, 1.7, 2.5, 3.1, 1.9, 3.4 is:.. The mean of the observations 14, 16, 34, 12, 512, 23 is:.. The median of the observations 14, 16, 34, 12, 512, 23, 1112 is :.. Find the median of the data 17, 13, 18, 17, 13, 16, 18, 19, 18, 13, 16, 18, 20, 19... The heights in cm of 9 students in the 9th grade are 149, 160, 151, 149, 151, 153, 160, 14.. 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Find the derivative of e3x ln 4x with respect to x... Find the derivative of 5x( e7x + e-7x) with respect to x.. If y = 7x e5x sin 4x, then find dydx... If y = 3x 5x ln 4x, then what is dydx?.. If y = 8sec 2x3x, then find dydx.. If y = e5x2x2, then dydx = ?.. If y = ln 4x2x, then find dydx.. If y = cos 3xln 6x, then dydx = ?..
